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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 1891 - 1900 of 16514
Interpretations Date
 search results table

ID: 11695JEG

Open

Mr. William G. Larrabee
141 Cotton Brook Road
Dover-Foxcroft, Maine 04426

Dear Mr. Larrabee:

This responds to your letter asking in what year it was mandated that the U.S. auto industry begin to install safety belts in new cars. I am pleased to provide this information to you.

The National Highway Traffic Safety Administration (NHTSA, then called the National Traffic Safety Agency) required all new passenger cars to have safety belts beginning on January 1, 1968. This requirement was included in one of the agency's initial Federal motor vehicle safety standards, which was based on the laws of 32 states. NHTSA required other types of new motor vehicles, such as sport utility vehicles, vans, and trucks, to have safety belts beginning on July 1, 1971.

I hope this information is helpful.

Sincerely,

Samuel J. Dubbin Chief Counsel

ref:208 d:4/26/96

1996

ID: 11697DRN

Open

Mr. Christophe Malaterre
Project Manager, International
PIVCO AS
Stanseveien 4
N-0975 Oslo, Norway

Dear Mr. Malaterre:

This responds to your question whether the National Highway Traffic Safety Administration (NHTSA) requires U.S. motor vehicles to carry the Standard No. 125 warning device. The answer is no.

As you indicated in your letter, Standard No. 125, Warning devices, establishes requirements for devices, without self-contained energy sources, that are designed to be carried in motor vehicles and used to warn approaching traffic of the presence of a stopped vehicles. Nothing in Standard No. 125 requires that a warning device be placed in a new motor vehicle.

Please note that the Federal Highway Administration, our sister agency in the U.S. Department of Transportation, establishes requirements for commercial vehicles and commercial drivers. That agency may have requirements for the Standard No. 125 device, when used in commercial vehicles. For information on warning device requirements for commercial vehicles, please contact: Mr. James E. Scapellato, Director, Office of Motor Carrier Research and Standards, Federal Highway Administration, 400 Seventh St., S.W., Washington, D.C. 20590.

In addition, some states may have requirements for use of the Standard No. 125 warning device. You may be able to receive relevant information about various state requirements from: Automotive Manufacturers Equipment Compliance Agency, Inc., 888 16th St., N.W., Suite 700, Washington, DC 20006. Their telephone number is: (202) 898- 0145.

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 at (202) 366-2992. Our FAX number is (202) 366-3820.

Sincerely,

Samuel J. Dubbin Chief Counsel ref:125 d:4/12/96

1996

ID: 11698.ZTV

Open

M. Guy Dorleans
International Regulatory Affairs Manager
VALEO
34, rue St.-Andre
93012 Bobigny cedex
France

Dear M. Dorleans:

We have received your letter of March 19, 1996, asking for an interpretation of paragraphs S7.2(a) and S7.5(g) of Motor Vehicle Safety Standard No. 108. These paragraphs require that lenses of replaceable bulb headlamps be marked with the DOT symbol and the HB-type of light source used in the headlamp. Your engineers contemplate a clear-lensed headlamp, and would like to engrave these markings on a visible area of the inner bezel where they are easily seen from the outside. You ask for confirmation that this would meet the "spirit" of the requirement even if the definition of lens doesn't apply to an interior part.

The Federal motor vehicle safety standards specify objective requirements. Failure to mark the lens in the manner specified by Standard No. 108 would create a noncompliance with the standard. Paragraphs S7.2(a) and S7.5(g) are very specific in their requirements that the lens be marked, and do not allow alternative marking of the bezel if the lens is clear.

If you have any questions, you may refer them to Taylor Vinson of this Office (FAX 202-366-3820).

Sincerely,

Samuel J. Dubbin Chief Counsel ref:108 d:4/25/96

1996

ID: 11701DRN

Open

Mr. Ernest Cuff
General Manager
Sputhe Engineering, Inc.
11185 Lime Kiln Road
Grass Valley, CA 95949-9715

Dear Mr. Cuff:

This responds to your letter asking several questions concerning your planned manufacture of motorcycles. You explain that your company presently manufactures Aaftermarket [motorcycle] engine and transmission components@ and is negotiating with an Australian company to manufacture and sell motorcycles in the United States.

By way of background, the National Highway Traffic Safety Administration (NHTSA) is authorized by Congress (49 U.S.C. Chapter 301) to issue Federal motor vehicle safety standards that set performance requirements for new motor vehicles and new items of equipment. NHTSA does not approve or certify any motor vehicles or motor vehicle equipment. Instead, our statute establishes a "self certification" process under which each manufacturer has the responsibility to certify that its product meets all applicable standards.

Your questions are as follows:

1. What if any, standards must be met for U.S. production?

ANSWER: The following Federal Motor Vehicle Safety Standards (49 C.F.R. Part 571) apply to motorcycles: Standard No. 106, Brake hoses; Standard No. 108 Lamps, reflective devices, and associated equipment; Standard No. 111 Rearview mirrors; Standard No. 115 Vehicle identification number - basic requirements; Standard No. 116 Motor vehicle brake fluids; Standard No. 119 New pneumatic tires for vehicles other than passenger cars; Standard No. 120 Tire selection and rims for motor vehicles other than passenger cars; Standard No. 122 Motorcycle brake systems; and Standard No. 123 Motorcycle controls and displays.

Each motorcycle must be certified by its manufacturer as meeting all applicable safety standards. The certification must be made in accordance with 49 CFR Part 567, Certification. In addition, if a vehicle contains a safety-related defect, the vehicle manufacturer must notify all owners, purchasers, and dealers of the defect and provide a remedy without charge.

A new manufacturer of motor vehicles or motor vehicle equipment must submit information identifying itself and its products to NHTSA not later than 30 days after it begins manufacture (49 CFR Part 566, Manufacturer Identification). I am, for your information, enclosing an information sheet, "Information for New Manufacturers of Motor Vehicles and Motor Vehicle Equipment" and another sheet that describes how you may obtain copies of NHTSA=s standards.

The U.S. Environmental Protection Agency (EPA) has established motor vehicle noise and emission standards. For information on EPA's requirements, please contact:

Office of Mobile Sources, ANR-455 Environmental Protection Agency 401 M Street, S.W. Washington, D.C. 20460 Telephone (202) 260-7645

2. Is there an annual level of production at which certain rules would apply, or would all rules apply for a production of as low as 2 to 3 units per year?

ANSWER: Each motorcycle must be certified as meeting the safety standards, regardless of production levels. Thus, even if only one motorcycle is manufactured, all the requirements mentioned in our response to question one would apply.

3. Would the Australian certification be accepted here, or would it be necessary to initiate a whole new round of testing to achieve U.S. certification?

ANSWER: As noted above, it is the manufacturer, not NHTSA, who self-certifies its motor vehicles or items of equipment. Manufacturers certifying compliance with the safety standards are not required to initiate any kind of testing for their certifications.

Each of NHTSA's safety standards specifies the test conditions and procedures that this agency will use to evaluate the performance of the vehicle or equipment being tested for compliance with the particular safety standard. However, NHTSA does not require a manufacturer to test its products only in the manner specified in the safety standards. A manufacturer may choose any means of evaluating its products to determine whether the vehicle or item of equipment complies with the requirements, provided, however, that the manufacturer assures that the vehicle will comply with the standard when tested by NHTSA.

If NHTSA's compliance test were to show an apparent noncompliance of a vehicle with the standard, the vehicle manufacturer would be asked to show the basis for its certification that its vehicle complies with the standard. If in fact there is a noncompliance, the manufacturer would

be subject to civil penalties unless it can establish that it exercised "reasonable care" in the manufacture of the product and in the checks (through actual testing, computer simulation, engineering analyses, or other means) to ensure compliance.

It may be simplest for a manufacturer to establish that it exercised "reasonable care" if the manufacturer conducted testing that strictly followed a specific standard's compliance test

procedures. However, "reasonable care" might be shown even if modified test procedures were used.

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 at (202) 366-2992.

Sincerely,

Samuel J. Dubbin Chief Counsel

Enclosures

ref:571.3 d:4/24/96

While the exercise of "reasonable care" may relieve a manufacturer of liability for civil penalties for the manufacture and sale of noncomplying vehicles or equipment, it does not relieve a manufacturer of the responsibility to notify purchasers of the noncompliance and remedy the noncompliance free of charge.

1996

ID: 11704.WKM

Open

Richard E. Trachtenberg, Esq.
Post Office Box 11005
330 Vanderbilt Motor Parkway
Hauppauge, NY 11788-0903

Dear Mr. Trachtenberg:

This responds to your letter of March 27, 1996 addressed to Walter Myers of my staff. You provide what you think may be tire identification number (TIN) 5R5691439T and ask us to verify that the number is a TIN and if so, provide you the information that it represents. You also state that the tire may be a retreaded tire. Our answer is that this number does not appear to be a TIN.

Title 49, Code of Federal Regulations, Part 574.5 establishes the requirement for TINs and specifies the information to be contained therein as well as the format and sequence of such information. Part 574.5 requires that the TIN be composed of four groups of symbols, letters and/or numbers. The first grouping, composed of two or three symbols, represents the manufacturer's identification mark assigned by this agency in accordance with Part 574.6. The second and third groupings identify the tire size and significant characteristics of the tire respectively, both at the option of the manufacturer. The fourth grouping of three symbols shows the week and year of manufacture.

The series of numbers and letters in question, 5R5691439T, do not comply with the requirements of Part 574.5. The first two or three characters, A5R@ or A5R5, have not been assigned by this agency. New tires are assigned a two-character code which may be either two letters or a number and a letter, for example ABA@ or A1B.@ Retreaded tires are assigned a three-letter code, such as ACJX.@ The numbers "439" could represent the manufacturing date, for example the 43d week of 1989, but there is no provision in the regulation for a "T" at the end of the

TIN. Thus, these numbers and letters do not comply with the TIN requirements of Part 574.5, and this agency has no record of or information on this particular series of numbers and letters.

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

Sincerely,

Samuel J. Dubbin Chief Counsel

Ref:574 d:5/1/96

1996

ID: 11704R.WKM

Open

Richard E. Trachtenberg, Esq.
P.O. Box 11005
330 Vanderbilt Motor Parkway
Hauppauge, NY 11788-0903

Dear Mr. Trachtenberg:

This letter supersedes my letter to you of May 1, 1996, which contains a transcription error.

This responds to your letter of March 27, 1996, addressed to Walter Myers of my staff. You provide what you think may be tire identification number (TIN) 5R5691439T and ask us to verify that the number is a TIN and if so, provide you the information that it represents. You also state that the tire may be a retreaded tire. Our answer is that this number does not appear to be a TIN.

Title 49, Code of Federal Regulations, Part 574.5 establishes the requirement for TINs and specifies the information to be contained therein as well as the format and sequence of such information. Part 574.5 requires that the TIN be composed of four groups of symbols, letters and/or numbers. The first grouping, composed of two or three symbols, represents the manufacturer's identification mark assigned by this agency in accordance with Part 574.6. The second and third groupings identify the tire size and significant characteristics of the tire respectively, both at the option of the manufacturer. The fourth grouping of three symbols shows the week and year of manufacture.

The series of numbers and letters in question, 5R5691439T, do not comply with the requirements of Part 574.5. The first two or three characters, A5R@ or A5R5, have not been assigned by this agency. New tires are assigned a two-character code which may be either two letters or a number and a letter, for example ABA@ or A1B.@ Retreaded tires are assigned a three-letter code, such as ACJX.@ The numbers "439" could represent the manufacturing date, for example the 43d week of 1989, but there is no provision in the regulation for a "T" at the end of the

TIN. Thus, these numbers and letters do not comply with the TIN requirements of Part 574.5, and this agency has no record of or information on this particular series of numbers and letters.

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

Sincerely,

Samuel J. Dubbin Chief Counsel

ref:574 d:6/18/96

2

1996

ID: 11705-1.PJA

Open

Mr. James O. Webb
Chief Engineer
Converto Mfg. Co., Inc.
P.O. Box 287
Cambridge City, Indiana 47327

Dear Mr. Webb:

This responds to your letter pointing out some difficulties you anticipate in complying with the National Highway Traffic Safety Administration=s (NHTSA) recent rear impact protection (underride guard) regulations. Your company manufactures Aroll off@ hoist equipment, both trailer and truck mounted, that is used to pick up, put down, and dump the long rectangular dumpsters often used to collect trash and construction debris. The short answer to your question is that your straight-body vehicles are excluded from the requirements, while the trailers are not.

Your equipment basically consists of frame rails that lay on the back of the truck or trailer and are hinged at the rear of the trailer. To load a dumpster, the front end of the frame rails are raised by hydraulic pistons to a 45 to 50 degree angle, until the rear end of the rails touches the ground behind the vehicle. Once at this angle, a hoist cable pulls the dumpster up the rails onto the back of the vehicle, after which the pistons are collapsed to return the dumpster to a horizontal orientation. The opposite sequence is used to lower the dumpster. Based on the product literature you enclosed, it appears that your factory mounts this equipment on new truck and trailer chassis prior to first sale. You state that it would be impractical, if not impossible, to mount underride guards on these vehicles, presumably because the guard would be mounted on the rails and would prevent them from being fully raised.

Federal Motor Vehicle Safety Standard (FMVSS) No. 224, Rear impact protection, requires most trailers and semitrailers weighing over 10,000 pounds to be fitted at the rear with a rear impact (underride) guard meeting the requirements of FMVSS No. 223, Rear impact guards (49 CFR 571.223 and 571.224, published on January 24, 1996 at 61 FR 2004). Two excluded categories of vehicles that are relevant for the purposes of this letter are single unit trucks and special purpose vehicles.

With regard to the Outside Rail Roll-off Tilt Frame Hoist installed on a truck, the vehicle is excluded. Note that the regulation applies only to trailers and semitrailers. Because these vehicles are single unit (i.e., unarticulated) trucks, FMVSS No. 224 does not apply to them.

A special purpose vehicle is defined in S4 of FMVSS No. 224 as being Aa trailer or semitrailer having work- performing equipment . . . that, while the vehicle is in transit, resides in or moves through the area that could be occupied by the horizontal member of the rear underride guard . . . (emphasis added).@ Your Semi- trailer Roll-off Tilt Frame Hoist is not excluded, because it does not meet the definition of a special purpose vehicle. Although NHTSA considers the rails to be work performing equipment that, as the frame is tilted, passes through the area where the horizontal member of the underride guard would be located, they do not do so while the vehicle is in transit.

NHTSA addressed the issue of roll off hoist trailers in the final rule. The National Solid Wastes Management Association (NSWMA), a trade group that we believe represents many of your customers, requested special consideration for roll-off hoist vehicles. However, NSWMA=s main objection was requiring guards on the containers themselves, which is not your concern. NSWMA stated in their comment that:

[t]he most common type of roll-off tilt frame used is the >outside rail= design . . . In these cases the rear underride [guard] required by [23 CFR] 393.86 will contact the ground at a frame tilt angle of approximate [sic] 40 degrees. Since this causes instability if the ground is uneven, a number of manufacturers have resorted to a retractable underride [guard] design, where a strut attached to the rear chassis frame will cause the underride [guard] to move forward and out of the interference area as the frame is tilted.

NHTSA assumed by this comment that a design solution had been found to address the problem of the guard hitting the ground. Therefore, NHTSA believed it was only necessary to respond to NSWMA that guards were not required on the container, only the trailer that carries it. We suggest that you contact NSWMA to explore the possibility of using the retractable guard design that it discussed.

If you believe your trailers should be excluded from Standard No. 224, you may submit a petition for rulemaking (see 49 CFR Part 552, which I have enclosed for your convenience) requesting that NHTSA amend the standard. If you have any further questions, please feel free to contact Paul Atelsek of my staff at this address or by telephone at (202) 366-2992.

Sincerely,

Samuel J. Dubbin Chief Counsel

1 Enclosure: Part 552 ref:224 d:5/16/96

1996

ID: 11708DRN

Open

Mr. Mike Graham
Business Administrator
Damascus Community Church
14251 S.E. Rust Way
Boring, OR 97009

Dear Mr. Graham:

This responds to your letter to Mr. James Hedlund, the National Highway Traffic Safety Administration's (NHTSA=s) Associate Administrator for Traffic Safety Programs, asking about the term school "related activities" included in NHTSA's August 1995 bulletin, "Frequently Asked Questions About Federal School Bus Safety Requirements." The term derives from the definition of "school bus" in the federal statute administered by NHTSA.

"Schoolbus" is defined at Title 49 of the United States Code, section 30125(a)(1) as:

a passenger motor vehicle designed to carry a driver and more than 10 passengers, that the Secretary of Transportation decides is likely to be used significantly to transport preprimary, primary, and secondary school students to or from school or an event related to school. (Emphasis added.)

NHTSA's safety standards are codified at Title 49 of the U.S. Code of Federal Regulations, Part 571. At Part 571.3, Definitions, we define "school bus" as:

a bus that is sold, or introduced in interstate commerce, for purposes that include carrying students to and from school or related events, but does not include a bus designed and sold for operation as a common carrier in urban transportation. (Emphasis added).

Your letter specifically refers to the "Federal Motor Carrier Safety Regulations." These are promulgated by the Federal Highway Administration (FHWA), our sister agency in the U.S.Department of Transportation. For further information about the motor carrier safety regulations, please contact the FHWA Chief Counsel's office at (202) 366-0740.

I hope this information is helpful. If you need any further information, please contact Dorothy Nakama of my staff at this address or at (202) 366-2992.

Sincerely,

Samuel J. Dubbin Chief Counsel

ref:vsa d:4/24/96

1996

ID: 11719MLV

Open

Mr. Don Bearden
Director - Governmental Affairs
Subaru of America, Inc.
Subaru Plaza
P.O. Box 6000
Cherry Hill, NJ 08034-6000

Dear Mr. Bearden:

This responds to your letter of April 1, 1996, requesting confirmation that a vehicle certified as a "passenger car" would not be subject to the labeling requirements of 49 CFR 575.105.

You are correct. Section 575.105(b) states that the requirements apply only to "multipurpose passenger vehicles."

I hope this information has been helpful. If you have other questions or need some additional information, please contact Mary Versailles of my staff at this address or by phone at (202) 366-2992.

Sincerely,

Samuel J. Dubbin Chief Counsel

ref:575.105 d:4/18/96

1996

ID: 11732-1.PJA

Open

Ms. Brigitte Neifer
Sekurit Saint-Gobain Deutschland
GmbH & Do. KG
Firmensitz
Viktoriaallee 3-5
D-52066 Aaohen GERMANY

Dear Ms. Neifer:

This responds to your letter asking whether one of your customers may use item 2 glazing (ordinary tempered glass) for motorcycle windshields. Your customer uses a kind of tempered glass not mentioned in our standard on its European model motorcycles, and is looking for a windscreen material for vehicles to be sold in the U.S. market. Although item 1 (laminated) glass is permitted in this application, your client is searching for an alternative and believes that item 2 (ordinary tempered) glazing should also be allowed on this 50 km/h maximum speed motorcycle, Ajust as it is allowed on off-highway machines.@ The short answer to your question is no, tempered glass is not one of the permitted materials in that location.

Federal motor vehicle safety standard No. 205, Glazing Materials (49 CFR '571.205) incorporates by reference ANSI Z26.1-1977 (Z26), which explains the performance requirements and application of different types of glazing materials. Z26 describes item 2 glazing as being for use Aanywhere in Motor Vehicle except windshields.@ Therefore, item 2 glazing is explicitly not allowed to be used on windshields, including motorcycle windscreens. Tempered glass does not have some of the safety attributes of laminated glass and thus is not permitted on windshields. Because motor vehicles are required to be safer than off-road vehicles, the fact that item 2 glazing may be used in off-highway vehicles (over which NHTSA has no jurisdiction) is immaterial.

As far as alternatives to item 1 glazing, item numbers 6, 7, and 10 glazing are also permitted. In certain locations, you may also use item numbers 5, 12, 13, 16A and B glazing.

Last, a note of clarification. You referred in your letter to Athe current version@ of the ANSI standard. Please be aware that it is the 1977 version of Z26 that is referenced and that any revisions of Z26 have no effect on the Federal requirements unless NHTSA adopts the revised ANSI standard in its regulations. I hope this information is helpful. If you have any further questions, please feel free to contact Paul Atelsek of my staff at this address or by telephone at (202) 366-2992.

Sincerely,

Samuel J. Dubbin Chief Counsel ref:205 d:5/9/96

1996

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.