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NHTSA Interpretation File Search

Overview

NHTSA's Chief Counsel interprets the statutes that the agency administers and the standards and regulations that it issues. Members of the public may submit requests for interpretation, and the Chief Counsel will respond with a letter of interpretation. These interpretation letters look at the particular facts presented in the question and explain the agency’s opinion on how the law applies given those facts. These letters of interpretation are guidance documents. They do not have the force and effect of law and are not meant to bind the public in any way. They are intended only to provide information to the public regarding existing requirements under the law or agency policies. 

Understanding NHTSA’s Online Interpretation Files

NHTSA makes its letters of interpretation available to the public on this webpage. 

An interpretation letter represents the opinion of the Chief Counsel based on the facts of individual cases at the time the letter was written. While these letters may be helpful in determining how the agency might answer a question that another person has if that question is similar to a previously considered question, do not assume that a prior interpretation will necessarily apply to your situation.

  • Your facts may be sufficiently different from those presented in prior interpretations, such that the agency's answer to you might be different from the answer in the prior interpretation letter;
  • Your situation may be completely new to the agency and not addressed in an existing interpretation letter;
  • The agency's safety standards or regulations may have changed since the prior interpretation letter was written so that the agency's prior interpretation no longer applies; or
  • Some combination of the above, or other, factors.

Searching NHTSA’s Online Interpretation Files

Before beginning a search, it’s important to understand how this online search works. Below we provide some examples of searches you can run. In some cases, the search results may include words similar to what you searched because it utilizes a fuzzy search algorithm.

Single word search

 Example: car
 Result: Any document containing that word.

Multiple word search

 Example: car seat requirements
 Result: Any document containing any of these words.

Connector word search

 Example: car AND seat AND requirements
 Result: Any document containing all of these words.

 Note: Search operators such as AND or OR must be in all capital letters.

Phrase in double quotes

 Example: "headlamp function"
 Result: Any document with that phrase.

Conjunctive search

Example: functionally AND minima
Result: Any document with both of those words.

Wildcard

Example: headl*
Result: Any document with a word beginning with those letters (e.g., headlamp, headlight, headlamps).

Example: no*compl*
Result: Any document beginning with the letters “no” followed by the letters “compl” (e.g., noncompliance, non-complying).

Not

Example: headlamp NOT crash
Result: Any document containing the word “headlamp” and not the word “crash.”

Complex searches

You can combine search operators to write more targeted searches.

Note: The database does not currently support phrase searches with wildcards (e.g., “make* inoperative”). 

Example: Headl* AND (supplement* OR auxiliary OR impair*)
Result: Any document containing words that are variants of “headlamp” (headlamp, headlights, etc.) and also containing a variant of “supplement” (supplement, supplemental, etc.) or “impair” (impair, impairment, etc.) or the word “auxiliary.”

Search Tool

NHTSA's Interpretation Files Search



Displaying 1151 - 1160 of 6047
Interpretations Date

ID: nht68-1.29

Open

DATE: 10/22/68

FROM: Joseph R. Gorman for Francis Armstrong -- NHTSA

TO: Valley Buick Company

TITLE: FMVSR INTERPRETATION

TEXT: Thank you for your letter of August 15, 1968, regarding safety standards applicable to the Austrian "Haflinger" vehicle.

This vehicle will be required by the National Traffic and Motor Vehicle Safety Act of 1966 to comply with the Federal Motor Vehicle Safety Standards. Enclosed are copies of the Act and the Standards and amendments through August 1963.

I have reviewed the prospectus you enclosed with your letter and would conclude that the "Haflinger" vehicle meets the definition of a multipurpose passenger vehicle as specified in Section 255.3 of the Initial Federal Motor Vehicle Safety Standards. Accordingly, any vehicle of this type, manufactured after January 1, 1963, must conform to the following Standards which have application to multipurpose passenger vehicles of less than 80 inches overall width:

FMVSS #103 - "Windshield Defrosting and Defogging"

FMVSS #104 - "Windshield Wiping and Washing Systems"

FMVSS #106 - "Hydraulic Brake Hoses"

FMVSS #107 - "Reflecting Surfaces"

FMVSS #111 - "Rearview Mirrors"

FMVSS #205 - "Glazing Materials"

FMVSS #209 - "Seat Belt Assemblies"

FMVSS #211 - "Wheel Nuts, Wheel(Illegible Words)

In addition, vehicles manufactured after January 1, 1969, will be required to comply with:

FMVSS #106 - "Lamps, Reflective Devices, and Associated Equipment"

FMVSS #112 - "Headlamp Concealment Devices"

FMVSS #113 - "Head Latch Systems"

(Illegible Words)

August 15, 1968

National Highway Safety Bureau Federal Highway Administration Department of Transportation Attention George Nield

Gentlemen:-

The early part of this year we arranged to handle a Vehicle named Haflinger, through Overland Vehicle Corp. of North Miami Beach, Florida, the imported. This vehicle is built in Austria. We are attaching a fly covering the specifications.

The Haflingers we have sold were 1967 Models, ie; built prior to January 1, 1963. All have been sold to operators of Ranches, such as the King Ranch. This vehicle is designed for cross-county, off the highway use. It has a maximum speed of forty-seven miles per hour.

The 1967 models we received were equipped with Seal-Beam Headlights, Parking and Stop-Lights. Directional Signals with Amber Side Lights mounted on each side at the front of the vehicle, tail and licence plate lights and windshield wipers.

About ninety days ago we placed an order with Overland Vehicle Corporation for twenty Haflingers accompanied by a letter of Credit. One of the conditions of the Letter of Credit, was that the vehicle would meet the Federal Safety Standards. We have been unable to contact any one during the last thirty days with the Overland Vehicle Corporation, and it appeared they had closed their office in North Miami Beach.

We have now been in communication with the Manufacturer of the vehicle in Austria and they advise that their contract with Overland expires August 31, 1963 and they have offered to sell us direct. This vehicle has created a lot of interest among farmore and ranchers in the area, as well as hunters.

It will be appreciated if you will give us an official ruling as quickly as possible of the Safety Standards necessary to enable us to import this vehicle for sale in the United States.

Thanking you, we are

Yours very truly,

VALLEY BUICK COMPANY -- Carl A. Murphy

ID: 08_003193 Martini--14 Nov 08--sa

Open

Mr. Gianni Martini

Superauto F.lli Biondi Srl, Homologation Department

Via Ponte a Giogoli 21

50019 Sesto F.no (FI)

Italy

Dear Mr. Martini:

This responds to your letter asking about the obligations of a foreign motorcycle windshield manufacturer under the requirements of the National Highway Traffic Safety Administration (NHTSA). I appreciate this opportunity to respond.

Your letter explains that you purchase plane sheets of a polycarbonate material produced by General Electric (GE), then thermoform the material and sell the pieces in Italy to a motorcycle manufacturer which exports motorcycles to the United States. We assume you mean that you purchase large sheets of GE polycarbonate and then use heat to form or mold the polycarbonate into motorcycle windshields which you sell to your customer.

By way of background information, NHTSA is authorized to issue Federal motor vehicle safety standards (FMVSSs) that set performance requirements for new motor vehicles and items of motor vehicle equipment. NHTSA does not provide approvals of motor vehicles or motor vehicle equipment, nor do we issue permits. Instead, it is the responsibility of manufacturers to certify that their products conform to all applicable FMVSSs before they can be offered for sale. NHTSA enforces compliance with the standards by purchasing and testing vehicles and regulated equipment, and we also investigate safety-related defects. For your information, we are enclosing a fact sheet entitled, Information for New Manufacturers of Motor Vehicles and Motor Vehicle Equipment, which directs you to the FMVSSs and regulations.

Pursuant to NHTSAs statutory authority, we established FMVSS No. 205, Glazing Materials, which specifies strength and light transmittance performance requirements for various types of glazing used in motor vehicles, including motorcycle windshields (copy enclosed). FMVSS No. 205 incorporates by reference American National Standard for Safety Glazing Materials for



Glazing Motor Vehicles and Motor Vehicle Equipment Operating on Land Highways-Safety Standard ANSI/SAE Z26.1-1996 (ANSI Z26.1).[1] FMVSS No. 205 and ANSI Z26.1 specify performance requirements for various types of glazing (called Items), and specify the locations in vehicles in which each item of glazing may be used.

Section S6 of FMVSS No. 205 establishes marking and certification requirements for manufacturers and distributors of glazing material. Different marking and certification requirements apply depending on whether a person is a prime glazing manufacturer, which is defined in S4 of the standard as one who fabricates, laminates, or tempers glazing materials, or a manufacturer cutting sections of glazing originally produced by someone else. NHTSA would consider you to be a prime glazing manufacturer because forming or molding polycarbonate is considered fabricating. Section S6.2 of FMVSS No. 205 specifies that prime glazing manufacturers certify that their products comply with FMVSS No. 205 by marking the glazing in accordance with section 7 of ANSI Z26.1, and adding to those markings in letters and numerals of the same size, the symbol DOT and a manufacturers code mark that NHTSA assigns to the manufacturer.

Under S6.2 of FMVSS No. 205, NHTSA will assign a code mark to a manufacturer after the manufacturer submits a written request to the NHTSAs Office of Vehicle Safety Compliance. You can submit your request for a code mark to the following address: NHTSA Office of Vehicle Safety Compliance, 1200 New Jersey Avenue SE, Washington, DC 20590.

The above certification requirements essentially apply to you as follows. Even though GE certified its polycarbonate sheets as complying with FMVSS No. 205, after forming the polycarbonate into the shape of the windshield you are selling, you as a prime glazing manufacturer must certify that the glazing continues to meet all applicable requirements of the standard. Each of NHTSAs safety standards specifies the test conditions and procedures that NHTSA will use to evaluate the performance of the vehicle or equipment being tested for compliance with the particular safety standard. To provide a basis for its certification of compliance, a prime glazing manufacturer may choose any valid means of evaluating its procedures to determine whether the glazing complies with FMVSS No. 205 (e.g., through actual testing, computer simulation, engineering analyses, or other means). However, the manufacturer must ensure that the product will meet FMVSS No. 205 when tested by NHTSA using the test procedures and conditions specified in the standard. Further, NHTSA may require a manufacturer to provide the data it used to determine whether the glazing material met FMVSS No. 205 requirements.

If a manufacturer or NHTSA determines that a noncompliance or safety-related defect exists, the manufacturer must notify purchasers of its product and remedy the problem free of charge. (Note that this responsibility is borne by the vehicle manufacturer in cases in which your glazing is installed on a new vehicle by or with the express authorization of that vehicle manufacturer.) In addition, a manufacturer is subject to civil penalties under 49 U.S.C. Chapter 301, unless it



can establish that it had no reason to know, despite exercising reasonable care, that the equipment did not comply. What constitutes reasonable care in a particular case depends on all relevant facts.

In addition to the requirements described above, please note that your manufacture of glazing materials may also be affected by NHTSA's longstanding interpretation of our regulation on manufacturer identification (49 CFR Part 566; copy enclosed), if the motorcycle manufacturer sells motorcycles equipped with your windshields in this country. We require a manufacturer of equipment to which an FMVSS applies (covered equipment, e.g., glazing products) to submit its name, address, and a brief description of the items of the equipment it manufacturers to NHTSA separately from the vehicle manufacturer to which the equipment manufacturer supplies its products. NHTSA has interpreted Part 566 to require the information from foreign manufacturers of covered equipment supplying their products to a foreign vehicle manufacturer selling its vehicles in the United States.

Please note that you are not required to designate an agent for service of process under 49 CFR Part 551 (Subpart D), if you supply your products only to a foreign vehicle manufacturer. This is the case even if the foreign vehicle manufacturer installs your products on vehicles that will be sold in the United States. However, please keep in mind that you must designate an agent under Part 551 if you decide to offer your equipment for importation into the United States.

Last, you ask about a Federal Motor Carrier Safety Administration (FMCSA) form MCS-150. FMCSA is the agency in the Department of Transportation that is responsible for regulations concerning the operation of commercial motor vehicles. Companies that operate commercial vehicles transporting passengers or hauling cargo in interstate commerce must be registered with FMCSA and must have a US DOT Number, and form MCS-150 is an application form for a US DOT number. If you want further information about the form, please contact FMCSA at 1-800-832-5660 or www.fmcsa.dot.gov.

If you have any further questions, please feel free to contact Sarah Alves of my staff at this address or by telephone at (202) 366-2992.

Sincerely yours,

Anthony M. Cooke

Chief Counsel

Enclosures

ref:205

d.1/16/09




[1] You can obtain a copy of ANSI/SAE Z26.1-1996 from the Society of Automotive Engineers, Inc., 400 Commonwealth Drive, Warrendale, PA 15096.

2009

ID: nht90-4.15

Open

TYPE: Interpretation-NHTSA

DATE: September 19, 1990

FROM: Paul Jackson Rice -- Chief Counsel, NHTSA

TO: Martin E. Simms -- Chartered Consulting Engineer

TITLE: None

ATTACHMT: Attached to instruction sheet dated 9-85 entitled Where to Obtain Motor Vehicle Standards and Regulations (text omitted)

TEXT:

This is in response to your letter on behalf of an Australian client who is proposing to construct, in conjunction with an American company, vehicles for sale in both Australia and the United States. You asked a number of questions about the substantive and procedural requirements of the safety standards. I will answer your questions in order.

1. What standards currently apply in America to 4 wheel drive vehicles (of about the same size as your Ford F350)? Are the Federal Motor Vehicle Safety Standards still the current standards?

The Federal Motor Vehicle Safety Standards (FMVSS) are still the applicable standards. The FMVSS may be found in Part 571 of Volume 49 of the Code of Federal Regulations (49 CFR Part 571). Each standard states the classes of motor vehicles to which it applies. Examples of classes of vehicles are passenger cars, trucks, and multipurpose passenger vehicles. Definitions of those terms may be found in the definitions section of the FMVSS (49 CFR S571.3).

2. Where can those standards be purchased and at what cost?

The FMVSS may be obtained from: Superintendent of Documents U.S. Government Printing Office Washington, D.C. 20402 Phone: (202) 783-3238 Prices must be obtained from the Superintendent of Documents since they are subject to periodic change. For further information, please refer to the information sheet entitled "Where to Obtain Motor Vehicle Safety Standards and Regulations" that is encl osed with this letter.

3. What is the procedure for proving compliance with American Federal standards and how long does it take to obtain approval (from time of application) to be able to market a vehicle?

The United States does not have an approval process similar to that of some other nations. In the United States, a manufacturer of motor vehicles must certify that its products comply with all applicable safety standards. The manufacturer's certificati on need not be based on actual tests, but may, in appropriate situations, be based on engineering judgment or computer simulations. The manufacturer is required to exercise due care in making the certification. The requirements concerning certification may be found at 49 CFR Part 567.

4. What government costs/fees are associated with seeking approval to

market a vehicle in America?

As explained above, the United States does not have an approval system.

5. Is there a classification system for vehicle types under U.S. Federal standards?

There is a classification system for motor vehicle types. Examples of classifications are passenger cars, trucks, and multipurpose passenger vehicles. These terms are defined at 49 CFR S571.3.

6. In instances where our Australian design rule standards are based on FMVSS rules, would testing done in Australia to FMVSS standards be acceptable in America?

As discussed above, there is no requirement in the United States that manufacturers submit test data for approval. Instead, manufacturers must exercise due care in certifying their compliance with the FMVSS. In appropriate cases, manufacturers may be a ble to rely on testing done in Australia to certify compliance with some United States safety standards.

7. Is there any requirement for testing laboratories to meet specific standards for compliance with FMVSS standards?

There is no explicit requirement that testing laboratories meet specific standards. However, an element of the due care that manufacturers must exercise in certifying compliance with FMVSS would be to use appropriate testing laboratories.

8. What requirements exist for the retention and/or submission of test data to American Federal agencies?

As mentioned above, manufacturers are not required to submit test data to have their vehicles approved. However, manufacturers would be well advised to retain such data as evidence of their due care in certifying compliance with the FMVSS. In addition, manufacturers must retain records concerning nonconformity with the FMVSS and possible defects relating to motor vehicle safety. Requirements concerning record retention may be found at 49 CFR Part 576.

9. In Australia, compliance with certain FMVSS standards will be accepted as compliance with Australian standards in some instances (subject to actual test data being submitted to the Australian authorities). Does such an arrangement exist in America?

As discussed above, manufacturers are not required to submit test data as part of any vehicle approval process. Manufacturers, in their exercise of due care in certifying compliance with the FMVSS, may rely on compliance with Australian standards in app ropriate instances. This would be most appropriate when the Australian standard is identical to the FMVSS requirement.

You also asked if there is other information about which your client should be aware. Your client should know that all manufacturers

headquartered outside of the United States must designate a permanent resident of the United States as the manufacturer's agent for service of all process, notices, orders, and decisions. This designation is to be mailed to the Chief Counsel of NHTSA. In accordance with 49 CFR S551.45, the designation must include the following information:

1. A certification that the designation is valid in form and binding on the manufacturer under the laws, corporate by-laws, or other requirements governing the making of the designation at the time and place where it is made;

2. The full legal name, principal place of business, and mailing address of the manufacturer;

3. Marks, trade names, or other designations of origin of any of the manufacturer's products which do not bear his name;

4. A statement that the designation shall remain in effect until withdrawn or replaced by the manufacturer;

5. A declaration of acceptance duly signed by the agency appointed, which may be an individual, a firm, or a U.S. corporation; and

6. The full legal name and address of the designated agent.

7. The signature of one with authority to appoint the agency. The signer's name and title should be clearly indicated beneath his signature.

I have enclosed, for your review, a designation letter which has been accepted by the agency.

In addition, your client should know that the Vehicle Safety Act requires manufacturers to notify purchasers concerning safety-related defects and failures to comply with the FMVSS and to remedy such defects and noncompliances without charge. Please ref er to 49 CFR Parts 573, 577, and 579 for further details.

We are enclosing an information sheet entitled "Information for New Manufacturers of Motor Vehicles and Motor Vehicle Equipment." This document highlights the major regulatory provisions that may be applicable to your client.

I hope that you find this information useful. Please feel free to contact us if you have any further questions.

ID: 15121.wkm

Open

Mr. Robert O. Martin
Division Vice President
Corporate Quality Assurance Division
Bridgestone/Firestone, Inc.
50 Century Boulevard
Nashville, TN 37214

Dear Mr. Martin:

Please pardon the delay in responding to your letter addressed to Walter Myers of my staff, in which you asked whether you may install light truck (LT) metric tires that comply with Federal motor vehicle safety standard (FMVSS) No. 119, New Pneumatic Tires for Vehicles Other Than Passenger Cars, and No. 120, Tire Selection and Rims for Motor Vehicles Other Than Passenger Cars, on a "Presidential Limo" that you describe as "basically a modified passenger vehicle." The installation of LT tires would not be permitted on a passenger car under the provisions of FMVSS No. 110, Tire Selection and Rims.

NHTSA defines a "passenger car" as "a motor vehicle. . ., except a multipurpose passenger vehicle, motorcycle, or trailer, designed for carrying 10 persons or less." A "multipurpose passenger vehicle" (MPV) is one designed to carry 10 persons or less but which "is constructed either on a truck chassis or with special features for occasional off-road operation." Finally, a motor vehicle, except a trailer, designed to carry more than 10 persons is classified as a bus.

You did not specify the original vehicle that you modified to create the presidential limo, other than to call it a modified passenger vehicle, nor did you describe the modifications you made to it. All the vehicles described in the previous paragraph are passenger vehicles, but each has different functions, classifications, and requirements. Thus, the classification of the basic vehicle determines which set of tire requirements apply to it.

If you "stretched" a passenger car, for example, or if you modified a passenger car other than by stretching it, the issue then becomes whether the vehicle as modified is still a passenger car or whether it should be recertified as a different type of vehicle. If it still carries 10 persons or less or if it has not become an MPV, it retains its classification as a passenger car. Paragraph S4.1 of FMVSS No. 110 states that passengers cars must be equipped with tires that meet the requirements of FMVSS No. 109, New Pneumatic Tires. Installation of tires certified as complying with FMVSS No. 119 is not permitted on passenger cars because of the high speed performance test required of passenger car tires but not of LT tires. Specifically, paragraph S4.2.2.6 of FMVSS No. 109 requires that passenger car tires be subjected to a high speed test, while paragraph S6.3 of FMVSS No. 119 applies the high speed test only to motorcycle tires and "non-speed-restricted tires of 14.5-in nominal rim diameter or less marked load range A, B, C, or D." We can assume that a stretched limo, in at least a few situations, may be driven at high speeds. If, on the other hand, the original vehicle was certified as an MPV, truck, or bus, FMVSS No. 120 specifies that tires that comply with either FMVSS Nos. 109 or 119 may be installed on it, provided that if passenger car tires under FMVSS No. 109 are installed on it, they would be subject to the 10 percent load rating correction factor specified in paragraph S5.1.2 of FMVSS No. 120.

I hope this information is helpful to you. Should you have any questions or require any further information, please feel free to contact Mr. Myers at this address or at (202) 366-2992.

Sincerely,
John Womack
Acting Chief Counsel
ref:109#110#119#120
d.10/1/97

1997

ID: 06-005825drn

Open

Adam Schumann, Engineer

Thoroughbred Motorsports

P. O. Box 369

22661 FM15

Troup, TX 75789

Dear Mr. Schumann:

This responds to your request for an interpretation of Federal Motor Vehicle Safety Standard (FMVSS) No. 122, Motorcycle Brake Systems. You wish to know whether a prototype brake system design for a three-wheeled motorcycle would meet FMVSS No. 122. Based on the information you provided to the agency and the analysis below, Ive concluded that because the product would not meet the requirement at S5.1.2.1 that each reservoir filler opening have its own cover, seal, and cover retention device, it would fail to meet FMVSS No. 122.

The National Highway Traffic Safety Administration (NHTSA) is authorized to issue FMVSSs that set performance requirements for new motor vehicles and new items of motor vehicle equipment (See 49 U.S.C. Chapter 301). NHTSA does not provide approvals of motor vehicles or motor vehicle equipment. Instead, manufacturers are required to self-certify that their vehicles and equipment conform to all applicable safety standards that are in effect on the date of manufacture. FMVSS No. 122 specifies performance requirements for motorcycle brake systems.

In your letter you describe your product as a three-wheeled motorcycle with approximately 143 horsepower. Unlike many motorcycles, your product will have a steering wheel instead of handle bars, a foot throttle operated by the drivers right foot, and a brake pedal operated by the drivers left foot. You state that the brake system will use a standard Ford Ranger dual master cylinder with a split reservoir with a single cap. The brake system and the brake foot pedal will actuate both front and rear systems simultaneously. You note that FMVSS No. 122 states at S5.1.2.1:

S5.1.2.1 Each master cylinder will have a separate reservoir for each brake circuit, with each reservoir filler opening having its own cover, seal, and cover retention device.

You asked whether NHTSA will accept the use of this standard passenger vehicle master cylinder on the motorcycle if it does not have two individual caps for each of the reservoirs.

Since your product would be classified as a motorcycle, it must meet the FMVSSs that apply to motorcycles, including FMVSS No. 122. As you are aware, although it would have a master cylinder with split reservoirs, front/rear, your design would have only one filler cover and seal. Each reservoir filler opening would not have its own cover, seal and cover retention device, as specified in S5.1.2.1. Your motorcycle would therefore not meet S5.1.2.1 of FMVSS No. 122.

You also seek confirmation that your product need not meet FMVSS No.123, Motorcycle controls and displays. The application section (S3.) of FMVSS No. 123 states: This standard applies to motorcycles equipped with handlebars As indicated above, you state in your letter that your motorcycle will incorporate a steering wheel instead of handle bars. Therefore, FMVSS No. 123 would not apply to your motorcycle.

* * *

With respect to FMVSS No. 122 above, our research on this issue revealed that the requirement for a separate reservoir for each brake circuit, with each reservoir filler opening having its own cover, seal and cover retention device, was proposed in a notice of proposed rulemaking (NPRM) of March 24, 1971 (57 FR 5516), to establish the safety standard on motorcycle brake systems. The NPRM did not discuss the reason for the requirement that each reservoir filler opening have its own cover, seal and cover retention device. The proposed language was made final (see 47 FR 5033, March 9, 1972), took effect on September 1, 1973, and has not been changed since.

In light of the design of your product, and history of the relevant rule, I would like to indicate in closing that this agency provides a procedure through which parties may petition to change regulations where safe and functional alternatives to existing rules are identified and can be demonstrated. In the event you believe your design can be supported in this way, please consider the procedure that is explained at NHTSAs regulation at 49 CFR Part 552, Petitions for rulemaking, defect, and noncompliance orders.

I hope this information is helpful. If you have any further questions, please feel free to contact Dorothy Nakama of my staff at this address or by telephone at (202) 366-2992.

Sincerely,

Anthony M. Cooke

Chief Counsel

ref:122

NCC-112:DNakama:62992:mar:dec/08/06:OCC#06-005825

Final 1/18/07; Dot rewrote per TC 2/2/07

[U:\NCC20\INTERP\122\06-005825drn.doc]

cc:NCC-112, subj/chron, Docket Std. 122, DN, NVS-100, NVS-200

ID: Bruno 2954

Open

Mr. Dick Keller

Director of Business Development

Bruno Independent Living Aids

1780 Executive Drive

PO Box 84

Oconomowoc, WI 53066

Dear Mr. Keller:

This responds to your letter in which you asked whether Federal Motor Vehicle Safety Standard (FMVSS) No. 403, Platform lift systems for motor vehicles, is applicable to a mobility device manufactured by your company. Based on the information you provided and the analysis below, Ive concluded that FMVSS No. 403 is not applicable to the devices as you have described.

By way of background, the National Highway Traffic Safety Administration (NHTSA) has authority to prescribe safety standards applicable to new motor vehicles and new items of motor vehicle equipment (49 U.S.C. Chapter 301). Under this authority, NHTSA adopted FMVSS Nos. 403 and 404, which establish minimum performance standards for platform lifts designed for installation on motor vehicles and motor vehicles installed with platform lifts, respectively. The purpose of the standards is to protect individuals who may be aided by canes or walkers as well as persons seated in wheelchairs, scooters and other mobility aids, when entering and exiting a motor vehicle. The standards were established December 27, 2002. Compliance with FMVSS No. 403 has been required as of April 1, 2005. Compliance with FMVSS No. 404 has been required as of July 1, 2005.

In your letter, you ask whether FMVSS No. 403 is applicable to a mobility device manufactured by your company, the Turning Automotive Seating system. You explain that the Turning Automotive Seating is manufactured in three basic models known as the Turny, the Turnout, and the Lift-Up Power Mobility Seat. You state that all three models are essentially a swivel seat base mechanism that rotates approximately 90 degrees with articulation to clear the B-pillar during vehicle entry and exit. You further stated that the Turny and Lift-Up add an elevating feature allowing access to taller vehicles. Under all three models the Turning Automotive Seating user is seated in the automotive vehicle seat during operation.



In a final rule published in the Federal Register (69 FR 58843) on October 1, 2004, the agency clarified that FMVSS No. 403 applies only to platform lifts that are designed to transport standing passengers as well as passengers in mobility aids. The application section was revised to read as follows:

This standard applies to platform lifts designed to carry standing passengers, who may be aided by canes or walkers, as well as, persons seated in wheelchairs, scooters and other mobility aids, into and out of the vehicle. (S3 of FMVSS No. 403).

This clarification (along with a corresponding one in the application section of FMVSS No. 404) was in response to comments from manufacturers of lifts and lift equipped vehicles in which the lifts were designed to transport occupants in gurneys and incubators. The commenters stated that such lifts could not accommodate a standing individual or an individual aided by a mobility device, such as a wheelchair or scooter. In the October 2004 final rule, we emphasized that the intent of FMVSS Nos. 403 and 404 is to protect lift users that occupy lifts while aided by canes or walkers, as well as lift users seated in wheelchairs, scooters and other mobility devices (69 FR 58844).

 

We note that we have discovered that due to a drafting error in a subsequent rule concerning the compliance dates for FMVSS Nos. 403 and 404, the clarifying language in the application sections of the two standards was inadvertently removed. We plan to correct this error and, in the meantime, continue to interpret the standards consistent with that clarification.

 

The mobility devices described in your letter rely on the motor vehicle seat to accommodate a vehicle occupant. You stated that the Turning Automotive Seating system does transport occupants into and out of motor vehicles, but that the system cannot accommodate a standing individual, or an individual while he or she remained in his or her mobility device. Given that the system as you described transports individuals while they are seated in the motor vehicle seat and is unable to accommodate standing individuals or permit individuals to remain in a wheelchair or other mobility device, your system would not be subject to FMVSS No. 403.

 

The issue of the intent of Standard No. 403 is further evidenced by the specific requirements of the standard. As Standard No. 403 was developed to address platform lifts designed to carry standing individuals and persons seated in wheelchairs or other mobility aids, many of the requirements are not relevant to a device such as the Turning Automotive Seating system. For example, Standard No. 403 contains requirements and test procedures for Threshold Warning Systems that warn passengers in mobility devices and standing passengers when they are near the edge of the vehicle floor and the lift platform is not at vehicle floor level. FMVSS No. 403 also contains requirements and test procedures for edge guards, wheelchair retention devices, surface protrusions, platform gaps, platform size, and platform handrails. These requirements and test procedures help assure that the platform has ample room to accommodate mobility devices and that passengers in mobility devices and standing passengers are retained and stabilized on the platform during operation. Also, the requirements and test procedures prevent excessive gaps and protrusions that must be traversed by passengers in mobility aids and standing passengers as they move onto the platform and into the vehicle. As we interpret the functionality of your system, these requirements are not relevant to your product.

If you have any additional questions, please contact Mr. Ed Glancy of my staff at (202) 366-2992.

Sincerely,

Anthony M. Cooke

Chief Counsel

ref:403&404

d.1/18/07

2007

ID: 1691y

Open

The Honorable Howard Wolpe
U.S. House of Representatives
Washington, D.C. 20515

Dear Mr. Wolpe:

Thank you for your letter to former Secretary Burnley on behalf of your constituent, Mr. Dennis Furr of Lansing, Michigan. I've been asked to respond to your letter since the National Highway Traffic Safety Administration (NHTSA) is responsible for administering Federal programs relating to school bus safety.

Mr. Furr is concerned about the potential safety problems that may result if school bus seats are being overloaded. In particular, Mr. Furr asks whether NHTSA's Highway Safety Program Guideline (HSPG) No. 17, Pupil Transportation Safety (23 CFR /1204.4), is consistent with Federal Motor Vehicle Safety Standard (FMVSS) No. 222, School Bus Passenger Seating and Crash Protection (49 CFR /571.222), with regard to seating specifications. Mr. Furr is particularly interested in how manufacturers are calculating the number of seating positions on a bench seat.

I am pleased to address your constituent's concerns. Before I begin, I want to note that we have answered a number of similar inquiries from Mr. Furr in past years.

We have two sets of "regulations" for school buses. The first, issued under the Vehicle Safety Act, includes our motor vehicle safety standards which apply to the manufacture and sale of new school buses. Compliance with these standards is mandatory for new vehicle manufacturers, and is enforced by this agency with civil penalties. FMVSS No. 222, with which your constituent is concerned, is one such safety standard. The second set of "regulations," or guidelines, for school buses was issued under the Highway Safety Act. Guidelines issued under this Act are not mandatory for the states; rather, they are recommended practices. Highway Safety Program Guideline No. 17, to which Mr. Furr frequently refers in his letter, consists of recommendations to the States for operating their school buses and pertains to Federal funding of State highway safety programs.

Both FMVSS No. 222 and Guideline No. 17 contain specifications for school bus seating. Paragraph S4.1 of FMVSS No. 222 states: "The number of seating positions considered to be in a bench seat is expressed by the symbol W, and calculated as the bench width in inches divided by 15 and rounded to the nearest whole number." The guideline for seating accommodations in HSPG 17 states:

Seating should be provided that will permit each occupant to sit in a seat in a plan view lateral location, intended by the manufacturers to provide seating accommodation for a person at least as large as a 5th percentile adult female, as defined in 49 CFR 571.3.

Mr. Furr appears to see a conflict between the formula used in calculating the forces to be applied to the seats of large school buses under FMVSS No. 222, on the one hand, and the use by States and manufacturers of 13-inch seating positions for rating the capacity of a 39-inch seat, on the other hand. I believe that Mr. Furr's belief in the existence of a conflict rests on a misunderstanding.

We view Standard No. 222 and HSPG 17 as complementary, not inconsistent. HSPG 17 reflects NHTSA's belief that all school bus passengers should be seated in the interest of safety. To that end, the guideline provides that there should be a seating position for each passenger and that the position should be at least large enough to accommodate a 5th percentile adult female. The hip width (sitting) of a 5th percentile adult female is 12.8 inches.

The figure "15" in FMVSS No. 222's compliance formula is not a minimum requirement for the width of a seating position. It is the number which is used to establish the number of designated seating positions and ensures that the forces applied to the seat during compliance tests are reasonable reflections of the crash forces that would be involved in a real-world crash. It is also the number which ensures that the width of the smallest seat is approximately equal to the hip width of the 5th percentile female. That is consistent with HSPG 17 which provides that seating positions shall be at least large enough for a 5th percentile female. Use of the figure "15" in the FMVSS No. 222 formula results in a minimum seating position width of 12.67 inches (for a 38-inch wide seat.) That is only slightly smaller than the 12.8 inch hip width of the 5th percentile female. For a 39-inch wide seat, the single position width is 13 inches, which is slightly larger than the hip width of a 5th percentile female.

It should be remembered, however, that the number of seating positions derived from the FMVSS No. 222 formula is not meant to be a measure of the absolute capacity of the bus for all size occupants. We recognize that, in practice, school buses transport a tremendously wide variety of student sizes. For example, a bus that may be capable of easily accommodating 65 preschool or elementary students may be capable of carrying only 43 high school students. When the bus is used to transport students of widely varying ages and sizes, reasonable accommodations may vary between those values. The decision on how many passengers may be comfortably and safely accommodated, therefore, is a decision that must be reached by the bus operator, in light of the ages and sizes of passengers involved.

NHTSA does not have the authority under either the Highway Safety Act or Vehicle Safety Act to regulate how States use school buses. Therefore, NHTSA could not preclude a State from carrying more passengers on a bench seat than there are designated seating positions. However, this agency agrees with Mr. Furr that a student should not sit on a seat unless the student can sit fully on the seat instead of sitting only partially on the seat and thus only being partially protected by the compartmentalization. We believe that Mr. Furr's concerns as they apply to public schools would be best addressed by his working with the local school board and state officials.

Mr. Furr is also concerned about a reference in our occupant crash protection standard (No. 208) to a 95th-percentile adult male occupant size. He asks why FMVSS No. 222 uses a 15-inch seat dimension, when FMVSS No. 208 references the 95th-percentile adult male occupant size in specifying occupant sizes which safety belts must adjust to fit.

Both FMVSS No. 208 and FMVSS No. 222 are directed at providing occupant crash protection. Both of these standards set forth comprehensive requirements that are directed at protecting occupants likely to be inside a vehicle in a crash. With regard to school buses, the agency determined that the crash protection requirements should be developed taking into account the full size range of passengers typically riding on school buses. If we designed the force and deflection (energy-absorbing) characteristics of the seats for the 95th percentile males, the seats may be too stiff for a small child.

Finally, Mr. Furr asks whether, when voluntarily installing safety belts on large school buses, States are violating Federal law by using S4.1 of FMVSS No. 222 in determining how many positions (and belts) there are on a bench seat. The answer is no. FMVSS No. 222 requires safety belts only for the passenger positions of small (10,000 pounds or less GVWR) school buses. Under S5 of the standard, belts on a small school bus bench seat are installed at "W" seating positions, as determined under S4.1. If a State wishes to order belts on its new large school bus and to use the same method for determining the number of belts to be installed, the State may do so.

I hope this information is helpful. If you have any further questions, please do not hesitate to contact me.

Sincerely,

Diane K. Steed /ref:VSA#222 d:2/23/89

1989

ID: 22118evisor1

Open



    Mr. David H. Coburn
    Steptoe & Johnson LLP
    1330 Connecticut Avenue, NW
    Washington, DC 20036-1795



    Dear Mr. Coburn:

    This responds to your letter requesting an interpretation of Federal Motor Vehicle Safety Standard (FMVSS) No. 205, Glazing materials, with respect to a product that would "automatically, and virtually immediately upon activation, create a shade band on top of the front windshield of a vehicle."

    You state in your letter that your client, Al-Coat, Ltd., a corporation based in Israel, has developed an electro-optical sun visor known commercially as e-Visor. The e-Visor is composed of a thin plastic band attached to the top part of the windshield. The e-Visor is approximately 5 inches wide and is made out of an electronically controlled light modulating (ECLM) film generally constructed with Polymer Dispersed Liquid Crystal technology. The ECLM film lightens with the application of voltage and returns to a darkened state when no voltage is applied. An electronic unit mounted under the dashboard controls the voltage applied to the band. A control unit mounted on the dashboard allows the driver to turn the band on or off, or place it in an automatic mode.

    In the automatic mode, the voltage applied to the band is controlled by a sunlight sensor mounted on the front windshield of the vehicle. The sensor responds to sunlight, causing the ECLM film to "instantaneously" assume a darkened state in "blinding or bright sunlight." In a darkened state, the e-Visor reduces the light transmittance of the windshield to approximately 1 percent, while the light transmittance in its lightened state is "approximately 50 percent." You state that the e-Visor "would have no effect on any part of the front windshield other than the area traditionally reserved for a shade band located near the top of the front windshield." You also state that Al-Coat seeks to import this product into the United States. The e-Visor would be made available to original equipment manufacturers and/or marketed as an aftermarket product for installation on used vehicles.

    By way of background information, the National Highway Traffic Safety Administration (NHTSA) has the statutory authority to issue FMVSSs applicable to new motor vehicles and new items of motor vehicle equipment. NHTSA, however, does not approve motor vehicles or motor vehicle equipment or pass on the compliance of a vehicle or item of equipment outside the context of an actual enforcement proceeding. Instead, Federal law establishes a self-certification system under which motor vehicle and equipment manufacturers themselves certify that their products comply with all applicable standards. The following represents our opinion based on the facts set forth in your letter.

    Installation in New Vehicles

    A manufacturer of a new vehicle must certify that its vehicle meets all applicable Federal motor vehicle safety standards. Any person who manufactures or sells a new vehicle which does not conform to any safety standard is subject to civil penalties and recall action under our statute.

    NHTSA has issued FMVSS No. 205, Glazing materials, to establish performance and location requirements for glazing in each new motor vehicle. FMVSS No. 205 incorporates an industry standard, the American National Standard "Safety Code for Safety Glazing Materials for Glazing Motor Vehicles Operating on Land Highways (ANSI Z26.1)." Under FMVSS No. 205 and the ANSI standard, glazing for use at levels intended for driving visibility must meet all of the requirements of the standard, including those on light transmittance. FMVSS No. 205 and ANSI Z26.1 apply a 70 percent light transmittance requirement to areas of glazing that are requisite for driving visibility.

    In all vehicles, the windshield is considered requisite for driving visibility. However, ANSI Z26.1 provides that a manufacturer may provide an area on the glazing that has a light transmittance of less than 70 percent as long as the areas requisite for driving visibility have a light transmittance of 70 percent. Our longstanding position has been that the area of the windshield traditionally comprising a shade band is not considered requisite for driving visibility, so that area may have a light transmittance of less than 70 percent.

    After reviewing the information you have submitted, we have concluded that the e-Visor operates and is intended to operate as a shade band. We have reached this conclusion based on the specific facts and purposes of your client's particular design and on your representations that the product would not affect any part of the windshield other than within the area traditionally reserved for a shade band; i.e., an approximate 5-inch band located near the top of the windshield. As a shade band in that location, the e-Visor would not be subject to FMVSS No. 205's light transmittance requirement.

    Although the agency has concluded that your shade band is not in an area considered requisite for driving visibility, it is important to note that we are in the midst of rulemaking on limiting the width of shade bands. We have published an August 4, 1999, notice of proposed rulemaking (64 FR 42330) on this subject. It may be appropriate for you to examine whether the e-Visor would be affected by a possible new shade band requirement.

    Of course, a new vehicle with the e-Visor must be certified, for its location and installation (e.g., windshield), as meeting all other requirements in FMVSS No. 205, including all applicable performance requirements of the standard (haze resistance, scratch resistance, and etc.). In addition, there are a number of other standards that might be affected by installation of the component. In particular, I would like to draw your attention to FMVSS No. 103, Windshield defrosting and defogging systems, FMVSS No. 212, Windshield mounting, FMVSS No. 219, Windshield zone intrusion, and FMVSS No. 201, Occupant protection in interior impact. You should carefully review these and all other FMVSSs to determine how the product would affect a vehicle's conformance with these standards.

    In addition, S5.3.5 of FMVSS No. 101, Controls and displays, reads as follows:

      Any source of illumination within the passenger compartment which is forward of a transverse vertical plane 110 mm rearward of the manikin "H" point with the driver's seat in its rearmost driving position, which is not used for the controls and displays regulated by this standard, which is not a telltale, and which is capable of being illuminated while the vehicle is in motion, shall have either (1) light intensity which is manually or automatically adjustable to provide at least two levels of brightness, (2) a single intensity that is barely discernible to a driver who has adapted to dark ambient roadway conditions, or (3) a means of being turned off. This requirement does not apply to buses that are normally operated with the passenger compartment illuminated.

    The purpose of this requirement is to prevent glare visible to the driver. If the e-Visor control unit installed in view of the driver were capable of operation while the vehicle is in motion, it would be subject to this requirement.

    As an Aftermarket Item of Equipment

    The e-Visor is an item of motor vehicle equipment since it would be sold as part of a motor vehicle or as an addition to a vehicle. (See 49 U.S. Code (U.S.C.) 30102(a)(7)). While the e-Visor is an item of motor vehicle equipment, NHTSA has not issued any FMVSSs establishing performance standards directly applicable to this product if it were sold directly to consumers for installation on used vehicles. However, the manufacturer, whether your client or a licensee, is subject to the requirements of 49 U.S.C. 30118-30120 which set forth the recall and remedy procedures for products with defects related to motor vehicle safety. Thus, if NHTSA or the manufacturer determines that the product contains a safety-related defect, the manufacturer is responsible for notifying purchasers of the defective equipment and for remedying the problem free of charge. (Note that this responsibility is borne by the vehicle manufacturer in cases in which the product is installed on a new vehicle by or with the express authorization of that vehicle manufacturer.)

    The installation of the e-Visor by a commercial entity is also subject to other restrictions. Our statute at 49 U.S.C. 30122 provides that a manufacturer, distributor, dealer, or vehicle repair business may not knowingly "make inoperative" any device or element of design installed on or in a motor vehicle in accordance with any FMVSS. Therefore, the e-Visor could not be installed by any of those entities if such use would adversely affect the ability of a vehicle's glazing to comply with the performance requirements of FMVSS No. 205, as well as the compliance of a vehicle with any other FMVSS. You should carefully review the FMVSSs to determine whether installation of the e-Visor would affect a vehicle's compliance with the standards. (1)

    I note that the Federal Motor Carrier Safety Administration has jurisdiction over interstate motor carriers operating in the United States. You should contact that Administration at (202) 366-2519 for information about any requirements that may apply to your product. In addition, states have the authority to regulate the use and licensing of vehicles operating within their jurisdictions and may have restrictions on shade bands. Therefore, you should check with the Department of Motor Vehicles in any state in which the equipment will be sold or used.

    Also, there is a procedural regulation that you need to meet to import the e-Visor into the United States. 49 CFR Part 551, "Procedural Rules," requires the actual manufacturer of foreign-manufactured motor vehicle equipment to designate a permanent resident of the United States as the manufacturer's agent for service of process in this country. The designation of the agent for the service of process must contain the following six items in order to be valid under section 551.45:

    1. A certification that the designation is valid in form and binding on the manufacturer under the laws, corporate by-laws, or other requirements governing the making of the designation at the time and place where it is made;

    2. The full legal name, principal place of business, and mailing address of the manufacturer;

    3. Marks, trade names, or other designations of the origin of any of the manufacturer's products which do not bear its name;

    4. A statement that the designation shall remain in effect until withdrawn or replaced by the manufacturer;

    5. A declaration of acceptance duly signed by the agent appointed, which may be an individual, a firm, or a U.S. corporation; and

    6. The full legal name and address of the designated agent.

    In addition, the designation must be signed by one with authority to appoint the agent, and the signer's name and title should be clearly indicated beneath his or her signature. This designation should be mailed to the address shown in section 551.45(b).

    For your further information, I am enclosing a fact sheet we prepared entitled Information for New Manufacturers of Motor Vehicles and Motor Vehicle Equipment, and Where to Obtain NHTSA's Safety Standards and Regulations.

    I hope this information is helpful. If you have any questions or need additional information, feel free to contact Nancy Bell of my staff at (202) 366-2992.

    Sincerely,

    John Womack
    Acting Chief Counsel

    Enclosure
    ref:205
    d.2/20/01




    1. The "make inoperative" provision does not apply to equipment attached to or installed on or in a vehicle by the vehicle owner. However, NHTSA urges vehicle owners not to degrade the safety of any system or device on their vehicles.



2001

ID: babcock1.ztv

Open

    Mr. Robert Babcock
    Manager, Corporate Affairs
    Hyundai America Technical Center, Inc.
    5075 Venture Drive
    Ann Arbor, MI 48108

    Dear Mr. Babcock:

    This is in reply to your letter of July 1, 2003, relating to my response of May 2, 2003 to a question you asked regarding possible preemption of a California statute relating to the distance between the front turn signal lamp and fog lamps (California Title 13, Section 691) by Federal Motor Vehicle Safety Standard (FMVSS) No. 108.

    In brief, fog lamps are not required items of lighting equipment under FMVSS No. 108. Thus, if California were to preclude fog lamps, FMVSS No. 108 would not preempt such an action. Similarly, California can address the spacing between fog lamps and turn signal lamps. However, California could not regulate fog lamps in a manner that would be inconsistent with the functioning of front turn signal lamps, which we do regulate. Based on available information, we concluded that FMVSS No. 108 did not preempt the California statute.

    You have expressed concern that your inquiry did not provide the full scope and context of your questions, and requested a further interpretation. You also requested our confirmation that "the California requirements would be preempted should that state fail to waive the inconsistent portions of its requirements in favor of FMVSS 108." We have been provided a copy of a letter sent to you on July 11, 2003, by the Department of California Highway Patrol (CHP) in reply to your letter to it of July 1, 2003 "regarding the spacing required between turn signal lamps and other forward-facing lighting devices." The CHP concluded that "the spacing requirements contained in 13 CCR for turn signal lamps in relation to fog lamps and passing lamps are, therefore, not identical to those contained in FMVSS 108." The CHP then cited California Vehicle Code (VC) Section 26103(b) which states, in effect, that the provisions of FMVSS No. 108 covering the same aspect of performance shall prevail over those that California has adopted. Then, the CHP concluded that "Any device complying with the FMVSS, with respect to any aspect of performance prescribed by the FMVSS, but in conflict with the VC or 13 CCR, is lawful in this state."

    As a result of its conclusion, the CHP informed you that "turn signal lamps may be mounted closer to fog lamps and driving lamps than specified in 13 CCR, provided they comply with all requirements contained in FMVSS No. 108," and that it "accepts the manufacturers certification regarding compliance with the FMVSS . . . ."

    CHPs letter indicates to us that it has acceded to Hyundais request for a favorable interpretation of California law relating to the spacing between fog lamps and turn signal lamps. In a telephone conversation with Taylor Vinson of this Office on August 8, 2003, you confirmed that you interpret CHPs letter as resolving any issue you may have had with the State relating to the spacing between fog lamps and turn signal lamps. Therefore, we regard your request of July 1 for a further interpretation as mooted by CHPs letter of July 11.

    Different fact situations may arise in the future in which you would like us to provide an opinion on the relationship between California law and FMVSS No. 108 as it affects Hyundai, and we would be willing to consider them at that time.

    Sincerely,

    Jacqueline Glassman
    Chief Counsel

    ref:108
    d.8/12/03

2003

ID: 11-000700 J.Hoffrichter (Std No. 207)

Open

James Hofrichter

Vice President of Engineering

Seats Incorporated

1515 Industrial Street

Reedsburg, WI 53959

Dear Mr. Hofrichter:

This responds to your January 11, 2011 letter concerning whether a new seating application for trucks meets the requirements of Federal Motor Vehicle Safety Standard (FMVSS)

No. 207, which governs vehicle seating systems. Specifically, you ask several questions about vertical movement of a seating system during testing and whether such movement would mean that the seat was not compliant with the requirements of S4.2.1 of FMVSS

No. 207. As explained below, we believe that the movement you describe may constitute a test failure under FMVSS No. 207.

By way of background, NHTSA is authorized by the National Traffic and Motor Vehicle Safety Act (49 U.S.C. Chapter 301, Safety Act) to issue FMVSSs that set performance requirements for new motor vehicles and new items of motor vehicle equipment. NHTSA does not provide approvals of motor vehicles or motor vehicle equipment.  Instead, manufacturers are required to self-certify that their products conform to all applicable safety standards that are in effect on the date of manufacture.

The following is our interpretation of the Safety Act and the FMVSSs based on the description contained in your letter.

S4.2.1, Seat Adjustment, states, Except for vertical movement of nonlocking suspension type occupant seats in trucks or buses, each seat shall remain in its adjusted position when tested in accordance with the test procedures specified in S5.

You describe your application as an upper seat on a motor-powered seat adjuster with both horizontal and vertical adjustment. You indicate that when you perform the pull test specified by FMVSS No. 207 and FMVSS No. 210 and apply the specified forces to the seat through the lap belt, shoulder belt, and seat center of gravity, with the seat riser initially set in the lowest position, the rear linkage of the riser rotates up about 1.5 inches to the highest position. You ask several questions regarding the requirements of S4.2.1 of FMVSS No. 207 and whether this movement violates the requirements of that paragraph.

You first ask whether paragraph S4.2.1 of FMVSS No. 207 applies to vertical movement of a motor-powered seat adjuster.

S4.2.1 contains only one exception to its requirement that a seat shall remain in its adjusted position when tested. The exception is for the vertical movement of nonlocking suspension type occupant seats in trucks or buses. Our understanding is that your seat is not a nonlocking suspension type occupant seat. It appears to adjust and lock in a manner similar to the seat described in a letter we sent to Paul Wagner (See enclosed March 21, 1995 letter). The standard does not provide an exception encompassing vertical movement in other types of seats.

You next ask, If the seat power riser vertical movement was due to rotation of the motorized parts beyond that due to backlash, would it be compliant if the seat is able to withstand the required FMVSS [No.] 207 forces?

We have interpreted FMVSS No. 207 to allow some deformation of the seats (e.g., bending or twisting) during the force test, provided that the structural integrity of the seats is maintained. We do not consider such deformation, by itself, to constitute a change in adjustment position. However, if deformation allows the seat to move from one adjustment position to another, that movement would violate S4.2.1s requirement that the seat remain in its adjusted position when tested.

In a previous interpretation letter, we discussed movement due to backlash, which typically refers to the gap between mechanical elements such as mating gears used to drive or move a device (See enclosed November 13, 2007 letter to Dick Sabath). We do not consider movement of a seat strictly due to backlash, regardless of whether the mechanism of adjustment is an electric motor, to be a change in adjustment position. Thus, such movement would not violate the requirement in S4.2.1 that the seat remain in its adjusted position when tested.

However, movement beyond backlash may violate S4.2.1. For example, if any of the seat movement is due to movement of the driving mechanism, such as rotation of the gear providing the seat adjustment, we would consider such movement to be a change in adjustment position and thus to be in violation of S4.2.1. In addition, if a change in the adjusted position is caused by the gear mechanism being destroyed, the seat would not comply with S4.2.1 (See enclosed December 23, 1994 letter to Paul N. Wagner).

You next ask, If the seat power riser vertical movement was due to adjustment teeth shearing, misaligning or slipping and moving from one position to another, would it be compliant if it is able to withstand the required FMVSS [No.] 207 forces?

As stated above, movement of the seat from one adjustment position to another during testing violates the requirements of S4.2.1. Accordingly, we would consider the seat movement described in your second question to be a test failure under FMVSS No. 207.



I hope this information is helpful. If you have further questions, please contact William Shakely of my staff at (202) 366-2992.

Sincerely,

O. Kevin Vincent

Chief Counsel

Enclosures

Ref: Standard No. 207

Dated: 6/22/12

2012

Request an Interpretation

You may email your request to Interpretations.NHTSA@dot.gov or send your request in hard copy to:

The Chief Counsel
National Highway Traffic Safety Administration, W41-326
U.S. Department of Transportation
1200 New Jersey Avenue SE
Washington, DC 20590

If you want to talk to someone at NHTSA about what a request for interpretation should include, call the Office of the Chief Counsel at 202-366-2992.

Please note that NHTSA’s response will be made available in this online database, and that the incoming interpretation request may also be made publicly available.

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