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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 15321 - 15330 of 16517
Interpretations Date

ID: GF009385

Open

    Mr. Karl Genest
    518 Jodoin
    St-Bruno, Quebec
    CANADA
    J3V 6G8


    Dear Mr. Genest:

    This responds to your letter of December 9, 2004, asking if any Federal regulations apply to your invention, which you describe generally as an accessory that attaches to the seatback of a vehicles front seat. You did not provide a description of your product except to note that it attaches to the seatback, and that "when attached to the back of a cars front seat, [my device] would intrude somewhat into the space occupied by passengers of the back seat". You state that the intrusion would be similar to those of two "car seat organizers," the photographs of which you enclose in your letter. In a phone conversation with George Feygin of my staff, you indicated that you intend to market your product in stores directly to consumers (in the "aftermarket").

    By way of background, the National Highway Traffic Safety Administration (NHTSA) issues Federal motor vehicle safety standards applying to the manufacture and sale of new motor vehicles and certain items of motor vehicle equipment sold in or imported into this country. NHTSA does not provide approvals of motor vehicles or motor vehicle equipment. Under 49 U.S.C. Chapter 301, manufacturers are required to certify that their vehicles and equipment meet applicable requirements.

    Because you did not describe your product, we are unable to provide an interpretation of the standards that could apply. However, we have the following general observations. Most of the Federal motor vehicle safety standards (FMVSSs) apply to the completed motor vehicle. Some FMVSSs apply to aftermarket equipment, including lamps and reflective devices, seat belt systems, and child restraints. Even if an FMVSS does not directly apply to your aftermarket product, there are several requirements that may affect you.

    First, 30122 of the Safety Act (49 U.S.C. Chapter 301) prohibits a manufacturer, distributor, dealer, or motor vehicle repair business from "making inoperative, in whole or in part" any part of a device or element of design installed on or in a motor vehicle in compliance with an applicable safety standard. That is, your device could not be installed by such businesses if they determine that the installation of your invention would adversely affect the vehicles compliance with any safety standard.

    With regard to your question about "possible intrusion zone" requirements affecting your product, it is possible that installation of this device could affect compliance with Federal Motor Vehicle Safety Standard (FMVSS) No. 201, Occupant protection in interior impact. This standard establishes performance requirements designed to reduce the risk of injury in the event an occupant strikes the interior of a vehicle during a crash. S5.2 of FMVSS No. 201 specifies that an area of the seat back that is within the "head impact area," as defined in 49 CFR 571.3 (enclosed), is subject to the head impact protection requirements of the standard. In addition, installation of your product could affect the vehicles compliance with the flammability resistance requirements of FMVSS No. 302, Flammability of interior materials (enclosed). That standard establishes flammability resistance requirements for certain vehicle components, including seat backs.

    The make inoperative provision does not apply to vehicle owners modifying their own vehicles. However, we recommend that owners not degrade the safety of their vehicles.

    Second, please note that motor vehicle accessories are items of "motor vehicle equipment" subject to the notification and remedy (recall) provisions of 49 U.S.C. 30118-30120. If a manufacturer or NHTSA determines that the product contains a safety-related defect, the manufacturer is responsible for notifying purchasers of the product and remedying the problem free of charge.

    Third, I am enclosing a copy of a procedural rule that applies to all manufacturers subject to the regulations of this agency. 49 CFR Part 551, Procedural Rules, Subpart D, requires all manufacturers headquartered outside of the United States to designate an agent for service of all process, notices, orders and decisions. This designation should be mailed to the Chief Counsel, National Highway Traffic Safety Administration, 400 Seventh Street, S.W., Washington, D.C. 20590, and must include the following information:

    1. A certification that the designation of agent 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 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 United States corporation; and,
    6. The full legal name and address of the designated agent.

    In addition, the designation must be signed by a person with authority to appoint the agent. The signer's name and title should be clearly indicated beneath his or her signature.

    If you need further assistance, please contact George Feygin of my staff at this address or at (202) 366-2992.

    Sincerely,

    Jacqueline Glassman
    Chief Counsel

    Enclosures
    ref:201
    d.2/16/05

2005

ID: 9443

Open

Mr. Steve J. Brooks
Program Manager
IAD West Coast, Inc.
5761 McFadden Avenue
Huntington, Beach CA 92649

Dear Mr. Brooks:

This responds to your letter asking about the operation and classification of a commercial vehicle you wish to manufacture. The vehicle will carry fewer than 10 passengers and its GVWR will be 11,500 pounds. You were particularly interested in the type of operator's license that would be required of the driver.

Driver licensing requirements for vehicle operators are determined by state law. Since the vehicle's GVWR will be less than 26,000 lbs, and the vehicle will presumably be designed to carry fewer than 15 passengers, the driver will not be required, under the Federal Highway Administration's (FHWA's) Commercial Driver Licensing (CDL) regulations, 49 CFR part 383, to qualify for a commercial driver license. However, some states require that drivers obtain a commercial driver license to drive vehicles that have lower GVWRs. The driver licensing requirements of the state in which the vehicle is registered, will apply. For more information about the CDL requirements, you can contact the FHWA Chief Counsel's office at (202) 366-0834.

Vehicle classification is relevant for the regulations and standards of our agency. The National Traffic and Motor Vehicle Safety Act authorizes the National Highway Traffic Safety Administration (NHTSA) to issue Federal motor vehicle safety standards (FMVSSs) for new motor vehicles and motor vehicle equipment. Each FMVSS for motor vehicles applies to one or more particular types of vehicles, e.g., a standard might apply to passenger cars, buses, trucks, and/or trailers.

To determine which FMVSSs apply to their vehicles, manufacturers classify their vehicles using the definitions in 49 CFR part 571.3 of NHTSA's regulations. Under part 571.3 (copy enclosed), your vehicle, which you said is built in a bus/truck chassis, appears to be a "truck" or a "multipurpose passenger vehicle." Under part 567, a manufacturer must state the vehicle classification on the vehicle's certification label and certify that its motor vehicle complies with all applicable FMVSSs. NHTSA may take issue with a manufacturer's vehicle classification in an enforcement proceeding if the agency does not agree with the manufacturer's classification.

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

Sincerely,

John Womack Acting Chief Counsel

Enclosure ref:567#571 d:4/7/94

1994

ID: 9448

Open

Mr. J. Hulshof
Nedap N.V.
P.O. Box 6
7140 AA Groenlo
The Netherlands

Dear Mr. Hulshof:

This responds to your letter to Mr. Patrick Boyd requesting a written interpretation concerning whether your sunroof would meet the requirements of Federal Motor Vehicle Safety Standard No. 118, "Power-Operated Window, Partition, and Roof Panel Systems." I apologize for the delay in responding.

By way of background, the National Traffic and Motor Vehicle Safety Act establishes a self-certification system under which manufacturers are responsible for ensuring that their products comply with all applicable FMVSSs. We do not approve, endorse, or gives assurances of compliance of any product. In response to manufacturers' requests for interpretations of the FMVSS's, we try, to the extent possible, to provide information that will help them make their determinations of compliance. However, these responses are based on information provided by the manufacturer, and are subject to the findings of actual compliance testing by the agency. Should the agency, in the future, examine your product and detect an apparent noncompliance or defect, those results will control.

You explain in your letter that your power-operated sunroof (which is a power operated "roof panel system" under Standard 118) can be closed only in four circumstances. In three of these, the ignition key must be activated. In the fourth, the sunroof can be closed when there is "Continuous operation of Central close mechanism, not capable [sic] closing the roof panel from a distance of more than 6 meters from the vehicle."

Standard 118 requires sunroofs other than those that have an automatic reversing feature to close only in certain circumstances. One of those (S4(a)) is when the key controlling the vehicle's engine is in the activated (i.e. "on", "start" or "accessory") position. The three circumstances you described where the ignition key must be activated to operate the sunroof appear to satisfy S4(a).

With regard to the fourth circumstance, Standard 118 also permits sunroofs to close "Upon continuous activation of a remote actuation device, provided that the...device shall be incapable of closing the [sunroof] from a distance of more than 6 meters from the vehicle" (S4(d)). The circumstance you described appears to satisfy S4(d). Your sunroof will close only upon continuous operation of a "Central close mechanism," and the mechanism is incapable of closing the sunroof from a distance of more than 6 meters from the vehicle.

I hope this information has been helpful. If you have any further questions, please contact Mr. David Elias of my office at the above address or by phone at (202) 366-2992.

Sincerely,

John Womack Acting Chief Counsel

ref:118 d:4/12/94

1994

ID: 9449

Open

Mr. Robert Matulich
8801 Ravenna Avenue, NE
Seattle, WA 98115

Dear Mr. Matulich:

This responds to your letter requesting information about Federal requirements applicable to your product. According to promotional literature that accompanied your letter, your "Clear Vu Mirror" is an attachment to exterior mirrors that clears raindrops, dust, and mist, thus making a mirror "virtually self-cleaning." I am pleased to explain the applicability of our regulations to your product.

By way of background information, the National Highway Traffic Safety Administration (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, however, approve or certify any vehicles or items of equipment. Instead, the National Traffic and Motor Vehicle Safety Act ("Safety Act") establishes a "self-certification" process under which each manufacturer is responsible for certifying that its products meet all applicable FMVSSs.

NHTSA currently has no FMVSSs that directly apply to the product you plan to manufacture. NHTSA issued an FMVSS for vehicle rearview mirrors (FMVSS No. 111), but the standard applies to new vehicles, and not to aftermarket mirror products. If your product were manufactured and sold as part of a new vehicle, the vehicle would have to be certified as complying with all applicable standards, including Standard No. 111. The standard sets field of view requirements for new motor vehicles, and your product would have to be mounted on a new vehicle such that it does not block the field of view required by FMVSS No. 111. However, since Standard No. 111 applies only to new vehicles, it does not apply to your product.

I note, however, that there are other Federal requirements that indirectly affect you and your product. Under the Safety Act, your product is considered to be an item of motor vehicle equipment. As a manufacturer of motor vehicle equipment, you are subject to the requirements in 151-159 of the Safety Act concerning the recall and remedy of products with safety related defects. I have enclosed an information sheet that briefly describes those responsibilities. In the event that you or NHTSA determines that your product contains a safety- related defect, you would be responsible for notifying purchasers of the defective equipment and remedying the problem free of charge.

In addition, manufacturers, distributors, dealers, and motor vehicle repair businesses are subject to 108(a)(2)(A) of the Safety Act, which states: "No manufacturer, distributor, dealer, or motor vehicle repair business shall knowingly render inoperative ... any device or element of design installed on or in a motor vehicle or item of motor vehicle equipment in compliance with an applicable Federal motor vehicle safety standard ...." It is conceivable that your product, when placed on a vehicle's exterior mirror, could "render inoperative" the vehicle's ability to comply with FMVSS No. 111. Persons in the aforementioned categories cannot install your product if it blocks the field-of-view required by FMVSS No. 111, or otherwise caused the vehicle to no longer comply with Standard No. 111.

The "render inoperative" prohibition of 108(a)(2)(A) does not apply to the actions of vehicle owners in adding to or otherwise modifying their vehicles or items of motor vehicle equipment. Thus, if your product were placed on an exterior mirror by the vehicle owner, the render inoperative provision would not apply. Nevertheless, NHTSA urges vehicle owners not to degrade the safety of any system or device on their vehicles, including the safety of their rearview mirrors.

I hope you find this information helpful. If you have any other questions, please contact Marvin Shaw of my staff at this address or by phone at (202) 366-2992.

Sincerely,

John Womack Acting Chief Counsel

Enclosure ref 111 d:4/7/94

1994

ID: 9450

Open

Mr. J. Frank Haasbeek
President
International Transquip Industries, Inc.
6131 Brookhill Drive
Houston, TX 77087-1131

Dear Mr. Haasbeek:

Thank you for your recent letter to Vice President Gore, concerning a rulemaking related to your product. You believe that this agency has proceeded too slowly in the rulemaking. The Vice President has forwarded your letter to me for a reply.

I understand your concern over this issue, but please be assured that this agency is working diligently to reach a final decision concerning this rulemaking. As you know, the notice of proposed rulemaking was published in March of this year, and the agency received a number of conflicting comments. We must carefully assess all of the arguments raised by the commenters before reaching a final decision. We are nearing the completion of that process and expect to announce a final decision in January 1994.

I hope this information is helpful and appreciate your patience in this matter.

Sincerely,

Howard M. Smolkin Acting Administrator

ref:121 d:12/23/93

1993

ID: 9457

Open

Mr. Matt Gerrity
7624 Rohrer Dr.
Downers Grove, IL 60516

Dear Mr. Gerrity:

This responds to your letter, forward to us on December 9, 1993, by Representative Harris W. Fawell, regarding the removal of the air bag in your 1990 Coupe de Ville. Because you have a physical handicap, you had your vehicle modified by the installation of a hand control system over the steering wheel. You are concerned that, in the event the air bag should activate, the steering device would probably pop off causing serious injury. You also stated that dealers and other mechanics are reluctant to disconnect the air bag because of Federal law.

As discussed below, in certain limited situations, the National Highway Traffic Safety Administration (NHTSA) has exercised its discretion in enforcing our regulations to provide some allowance when making modifications to accommodate the special needs of persons with disabilities. While the disconnection of an air bag by a dealer or motor vehicle repair business would ordinarily be a violation of Federal law, this is to advise you that this agency would not institute enforcement proceedings against a dealer or repair business that disconnected the driver side air bag in your vehicle. If you show this letter to your dealer or mechanic, you should be able to get this work performed.

By way of background information, NHTSA is authorized to issue Federal motor vehicle safety standards that set performance requirements for new motor vehicles and new items of motor vehicle equipment. Manufacturers are required by the National Traffic and Motor Vehicle Safety Act (Safety Act) to certify that their products conform to our safety standards before they can be offered for sale. Manufacturers, distributors, dealers and repair businesses modifying certified vehicles are affected by 108(a)(2)(A) of the Safety Act. It prohibits those businesses from knowingly rendering inoperative any elements of design installed on a vehicle in compliance with a safety standard.

Removal or disconnection of an air bag by any of the named commercial entities would violate the "render inoperative" prohibition, since air bags are installed to comply with Federal Motor Vehicle Safety Standard No. 208, Occupant Crash Protection. However, in certain situations where a vehicle must be modified to accommodate the needs of a particular disability, NHTSA has been willing to consider any violation of 108(a)(2)(A) a purely technical one justified by public need, and indicated that it would not institute enforcement proceedings. We will take this position for the specific factual situation cited above.

We caution, however, that only necessary modifications should be made. For example, S4.5.2 of Standard No. 208 requires a readiness indicator for an air bag system which is clearly visible from the driver's seating position. After the air bag is removed, this indicator would show that the air bag system is not operative. The readiness indicator should not be modified, so other drivers who may expect an air bag will be aware that the air bag is not functional.

I would also like to caution your dealer or mechanic to contact the vehicle manufacturer concerning the proper procedure for any air bag disconnection as this procedure could cause it to deploy and injure the mechanic. As a final caution, I note that the purpose of the "render inoperative" provision is to ensure, to the degree possible, that current and subsequent owners and users of a vehicle are not deprived of the maximum protection afforded by the vehicle as newly manufactured. Your letter states that you would have the air bag reconnected before selling the car. I urge you to have this work performed so that future users of the vehicle will have the protection the air bag affords.

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

Sincerely,

John Womack Acting Chief Counsel

cc: Representative Harris W. Fawell United States House of Representatives 2342 Rayburn House Office Building Washington, DC 20515-1313

ref:208 d:12/30/93

1993

ID: 9459ez

Open

Erika Z. Jones, Esq.
Mayer, Brown & Platt
2000 Pennsylvania Avenue, N.W.
Washington, D.C. 20006-1882

Dear Ms. Jones:

This responds to your letter asking for our concurrence that '103(d) of the National Traffic and Motor Vehicle Safety Act preempts a "California flammability standard" as that standard applies to child restraint systems. The standard you enclosed is California Business and Professions Code, Division 8, Chapter 3, '19006 and '19161. I apologize for the delay in this response.

Because it was not readily apparent from your letter that the California flammability standard applies to child restraint systems, Ms. Fujita of my staff contacted California state officials for more information about the standard. We were informed by Mr. Art Anderson, Chief of the California Highway Safety Office, that California does not have a flammability standard for child restraint systems. Mr. Anderson was aware that Federal Motor Vehicle Safety Standard (FMVSS) No. 302 applies to child restraints by way of S5.7 of FMVSS No. 213, "Child Restraint Systems."

As you point out, Federal preemption issues would arise if California had a flammability standard for child restraint systems that covered the same aspect of performance as FMVSSs 213 and 302. However, in view of Mr. Anderson's statement that California has no flammability standard for child restraint systems, we need not address those issues today.

We hope this information is helpful. Mr. Anderson of the California Highway Safety Office (telephone (916) 445-0527) said he will be happy to answer any questions you might have about California's requirements. If you any further questions about '103(d), please do not hesitate to contact us.

Sincerely,

John Womack Acting Chief Counsel

cc: Art Anderson ref:213#302 d:6/9/94

1994

ID: 9460a

Open

Mr. Winston Sharples
President
Cantab Motors, Ltd.
RR1, Box 537
Round Hill, VA 22141

Dear Mr. Sharples

We have received the application of Cantab Motors for temporary exemption from Motor Vehicle Safety Standards Nos. 208 and 214. The application meets our procedural requirements, and a Federal Register notice requesting comment is being prepared for publication.

We shall inform you when the Administrator has reached a decision on this matter, which we estimate will be between the middle of September and the middle of October.

Cantab's previous exemption from Standard No. 208 expired on May 1, 1993. Accordingly, Cantab may be in violation of 49 U.S.C. 30112(a) if it has manufactured for sale and sold vehicles manufactured after that date. Its application states that "[i]n the preceding twelve months, Cantab has manufactured nine Morgans for sale in the United States." Within 30 days of your receipt of this letter, please furnish the total number of Morgans that Cantab has manufactured for sale after May 1, 1993, and sold in the United States, between May 1, 1993, and the date of your response. Cantab should be aware that any sales of nonconforming vehicles before a grant of its application may be in violation of 49 U.S.C. 30112(a). If Cantab determines that it has manufactured and sold noncomplying vehicles, then it is required to notify and remedy the noncompliance according to statute. Alternatively, it may file an application for a determination pursuant to 49 CFR Part 556 that its noncompliance is inconsequential to safety. If this application is granted, Cantab would be excused from the statutory requirement to notify and remedy.

As a final matter, the application indicates Cantab's belief that it would be exempt from the phase-in requirements of Standard No. 214 for 1995 since only .75 car would be subject to the requirement. Although .75 car is less than one

vehicle, the agency rounds up from .50 vehicle in its calculations of compliance. For the same reason, the 1.87 vehicle estimated for 1996 compliance would be two vehicles, not one. The application is sufficient to cover both years.

If you have any questions on this matter, you may discuss them with Taylor Vinson of this Office (202- 366-5263).

Sincerely,

John Womack Acting Chief Counsel

ref: 214

ID: 9460b

Open

Mr. Winston Sharples
President
Cantab Motors, Ltd.
RR1, Box 537
Round Hill, VA 22141

Dear Mr. Sharples

I enclose a copy of an order of the Administrator granting the petition by Cantab Motors for temporary exemption from Motor Vehicle Safety Standards Nos. 208 and 214. The exemption from Standard No. 208 will expire on September 1, 1997, and that for Standard No. 214 on September 1, 1998.

In accordance with agency regulations on the subject, within 30 days after your receipt of this letter please provide the Director, Office of Vehicle Safety Compliance, with a copy of the certification label reflecting the exemption that will be used on Cantab's vehicles (49 CFR 555.9(a)).

We have received your letter of August 17, 1995, which admits that Cantab manufactured and sold nine vehicles manufactured after the expiration of its previous exemption that did not conform with Standard No. 208, and which enclosed a petition for a determination of inconsequentiality on this matter. This is currently under review.

If you have any questions, you may discuss them with Taylor Vinson of this Office (202-366-5263).

Sincerely,

John Womack Acting Chief Counsel ref:555 d:9/25/95

1995

ID: 9465

Open

Mr. Michael S. Marczynski
Sales Representative
Anita's Auto World
529 S. Charles Street
Lansing, MI 48912

Dear Mr. Marczynski:

This responds to your letter in which you asked whether it would be legal for you to install after-market roll pans and convertible tops on light duty pick-up trucks. I apologize for the delay in our response.

By way of background information, the National Highway Traffic Safety Administration (NHTSA) is authorized under the National Traffic and Motor Vehicle Safety Act (the Safety Act) to issue Federal motor vehicle safety standards that apply to the manufacture and sale of new motor vehicles and new items of motor vehicle equipment. The Safety Act prohibits any person from manufacturing, introducing into commerce, selling, or importing any new motor vehicle or item of motor vehicle equipment unless the vehicle or equipment item is in conformity with all applicable safety standards.

After a vehicle's first purchase for purposes other than resale, i.e., the first retail sale of the vehicle, the presence and condition of devices or elements of design installed in the vehicle under applicable safety standards is affected by a section 108(a)(2)(A) of the Safety Act which provides:

No manufacturer, distributor, dealer, or motor vehicle repair business shall knowingly render inoperative, in whole or in part, any device or element of design installed on or in a motor vehicle ... in compliance with an applicable Federal motor vehicle safety standard.

In general, this provision prohibits any manufacturer, dealer, distributor, or repair shop from removing, disabling, or otherwise "rendering inoperative" any of the safety systems or devices installed on the vehicle to comply with a safety standard. However, modifications that change a vehicle from one vehicle type to another (e.g., from a hard-top to a convertible) do not violate the "render inoperative"

prohibition as long as the converted vehicle complies with the safety standards that would have applied if the vehicle had been originally manufactured as the new type.

NHTSA has exercised its authority to establish four safety standards which have different requirements for convertible trucks: Standard No. 205, Glazing Materials, Standard No. 208, Occupant Crash Protection, Standard No. 216, Roof Crush Resistance, and Standard No. 302, Flammability of Interior Materials. An explanation of these differences follows.

Standard No. 205

Standard No. 205 specifies requirements for glazing materials used in motor vehicles. Material used in a convertible top may be subject to this standard.

Standard No. 208

Standard No. 208 sets forth requirements for occupant protection at the various seating positions in vehicles. These requirements differ depending on gross vehicle weight rating (GVWR) and year of manufacture. The requirements for hard-top and convertible vehicles manufactured in the same year may also differ.

Standard No. 216

Multipurpose passenger vehicles, trucks and buses with a GVWR of 6,000 pounds or less, manufactured on or after September 1, 1994, are required to comply with Standard No. 216. However, Standard No. 216 does not apply to convertibles.

Standard No. 302

Standard No. 302 specifies burn resistance requirements for materials used in the occupant compartment of motor vehicles. Material used in a convertible top may be subject to this standard.

In summary, you are responsible for ensuring that, in the process of installing a roll pan or convertible top, you do not remove, disable, or otherwise "render inoperative" any of the safety systems or devices installed on the vehicle to comply with a safety standard. However, to the extent that a different standard is applicable to convertibles, modifications which result in the vehicle complying with the standard that applied to convertibles are permitted.

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

Sincerely,

John Womack Acting Chief Counsel

ref:VSA#108#205#208#216#302 d:6/3/94

1994

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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