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
| Interpretations | Date |
|---|---|
ID: nht75-6.40OpenDATE: APRIL 16, 1975 FROM: MR. SICKS; MR. PETZOLDT -- FACHNORMENAUSSCHUSS TO: NHTSA, DOCKET SECTION TITLE: BURNING BEHAVIOUR OF INTERIOR MATERIALS FOR MOTOR VEHICLES ATTACHMT: ATTACHED TO LETTER DATED 5-9-75 TO MR. SICKS FROM RICHARD B. DYSON TEXT: In March 1975 the ISO Central Secretariat has published DRAFT INTERNATIONAL STANDARD ISO/DIS 3795 - Road vehicles - Determination of burning behaviour of interior materials for motor vehicles Please find enclosed the English version of this Draft International Standard. As mentioned in our letter of September 3, 1974 Sub-Committee 16 decided to require in this Draft International Standard the presence of supporting wires in all cases in order to avoid subjective interpretations of sample behaviour by the test personnel. As it is essential that laboratories charged with flammability tests conduct these tests according to the same procedure, we ask you to take into consideration the specifications of ISO/DIS 3795. We would appreciate it very much, if you could modify MVSS 302 so that also this standard requires the presence of supporting wires in all tests. We look forward to receiving your reply. (Attachment Omitted) |
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ID: nht71-3.48OpenDATE: 07/22/71 FROM: AUTHOR UNAVAILABLE; E. T. Driver; NHTSA TO: S. Jackson-Smith TITLE: FMVSS INTERPRETATION TEXT: This is in reply to your recent letter inquiring about the mounting of a spare tire between headlights of a Volkswagen Camper. There is no Federal regulation that prohibits the mounting of the spare tire on the front of a vehicle. Federal motor vehicle safety standards apply to new vehicles and regulate manufacturers so as to assure compliance with applicable requirements. The standards do not regulate the vehicle purchaser and owner. However, in the importation of vehicles into the United States, certain requirements must be met. These requirements are described in the enclosed pamphlet dated October 1969. If your vehicle has been manufactured more recently, up-to-date requirements may be obtained from your Volkswagen dealer. It is recommended that inquiry be made of the State in which the vehicle will be licensed or driven for applicable laws and regulations in this area. We appreciate your concern for motor vehicle safety. ENC. |
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ID: nht69-1.44OpenDATE: 08/13/69 FROM: AUTHOR UNAVAILABLE; Dowell H. Anders; NHTSA TO: Great Dame Trailers Incorporated TITLE: FMVSR INTERPRETATION TEXT: This is in reply to your letter of August 4, 1969, in which you asked whether the name of your company may be placed on the certification label affixed to vehicles manufactured by another company. The question of "private brand" manufacturing was raised at various stages of rulemaking in respect to the certification regulations. It was decided that the certification label on a vehicle must show the name of the actual manufacturer. This information is important in the enforcement of standards and regulations under the Act. The Vehicle Safety Act, moreover, places primary responsibility for conformity to the standards, and for certification of conformity, on the manufacturer, and the regulations are designed to implement that intent. You should note, however, that as a distributor of the vehicles in question you share the responsibility for compliance with the standards to the extent of your knowledge, and participate in the certification by passing it along to dealers or other distributors. We are pleased to be of assistance. |
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ID: nht69-2.26OpenDATE: 09/24/69 FROM: AUTHOR UNAVAILABLE; Francis Armstrong; NHTSA TO: Arrow Trailers Incorporated TITLE: FMVSR INTERPRETATION TEXT: This is in reply to your letter of August 15, 1969, to Dr. Brennar that has been referred to this office, in which you asked whether the name of another company may be placed on the certification label affixed to vehicles manufactured by your company. The question of "private brand" manufacturing was raised at various stages of rulemaking in respect to the certification regulations. It was decided that the certification label on a vehicle must show the name of the actual manufacturer. This information is important in the enforcement of standards and regulations under the Act. The Vehicle Safety Act, moreover, places primary responsibility for conformity to the standards and for certification of conformity, on the manufacturer, and the regulations are designed to implement that intent. You should note, however, that distributors of the vehicles in question share the responsibility for compliance with the standards to the extent of their knowledge, and participate in the certification by passing it along to dealers or other distributors. We trust this will clarify the situation for you. |
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ID: nht72-5.29OpenDATE: 08/21/72 FROM: AUTHOR UNAVAILABLE; Lawrence R. Schneider; NHTSA TO: Oshkosh Truck Corporation TITLE: FMVSR INTERPRETATION TEXT: This is in response to your letter of July 5, 1972, requesting an opinion as to how manufacturers may take into account a vehicle's speed capability in establishing GAWR. The Certification regulations do not specify particular speed criteria for establishing weight ratings. As a minimum, however, we believe the speed chosen should reflect the maximum speed at which it is reasonable to expect the vehicle to be driven. In the case where a vehicle is subject to some low-speed uses, such as seasonal use as a snow plow, we believe the figure on the certification label should be based on that use of the vehicle in which its expected speed is greatest. The regulations do not provide for variable ratings based on speed. Finally, you ask whether cautionary labels dealing with GAWR and GVWR figures may be installed in the cab. The NHTSA does not object to the use of such labels. They may be used, as appropriate, to indicate permissable use of higher loads in low-speed applications. |
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ID: nht70-1.34OpenDATE: 01/21/70 FROM: AUTHOR UNAVAILABLE; Z. Taylor Vinson; NHTSA TO: American Motors Corporation TITLE: FMVSR INTERPRETATION TEXT: In your letter of January 14 you discuss providing a right hand drive automobile to an "individual wish 'Diplomatic Status'". Since the car does not comply with Federal motor vehicle safety standards you ask if American Motors could "Sell such a vehicle for operation in the United States and could we deliver the vehicle and omit the safety plate." Because section 108(a)(1) of the National Traffic and Motor Vehicle Safety Act of 1966 prohibits the sale of vehicles which do not comply(Illegible Line) delivery of this right hand drive automobile could not take place in the United States. If the sales contract is executed in England and the vehicle delivered in Canada, to name one possibility, there would be no objection to importation of the vehicle pursuant to the term of 10 C.F.R. @ 12.80(b)(2)(vi), assuming diplomatic eligibility of the importer. I enclose a copy of the importation regulation for your information. There is no requirement for affixation of the certification label under these circumstances. I am not aware of any law which would prohibit operation of a right hand drive vehicle in this country. |
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ID: 15082.wkmOpenMr. Claude R. Beverly Dear Mr. Beverly: Please pardon the delay in responding to your letter to this agency in which you expressed concerns about the small space-saver spare tires with which new passenger motor vehicles are commonly equipped. We have addressed this issue in the past (see enclosed letters to Representative Paul E. Kanjorski, dated May 13, 1996; and to Senator Bob Graham dated January 11, 1993). We explained in those letters that although the space-saver spare tires are smaller than regular tires, they are nevertheless required to meet the Federal motor vehicle safety standards applicable to tires. Thus, although they are designed to be used only in emergencies and their service life is normally less than regular tires, they are as safe as regular tires if properly maintained and inflated and the vehicle manufacturer's recommendations are followed. Should you have any further questions, feel free to provide them to this office at this address or by fax at (202) 366-3820. Sincerely, |
1997 |
ID: 86-3.49OpenTYPE: INTERPRETATION-NHTSA DATE: 06/18/86 FROM: M. ARISAKA -- MANAGER, AUTOMOTIVE LIGHTING ENGINEERING CONTROL DEPT. STANLEY ELECTRIC TO: ERIKA Z. JONES -- CHIEF COUNSEL NHTSA TITLE: NONE ATTACHMT: ATTACHED TO LETTER DATED 07/28/86 TO M ARISAKA, FROM ERIKA Z JONES, REDBOOK A29, (3) STANDARD 108; TEXT: Dear Ms. Jones, We are thinking to sell an optional rear spoiler, in which a high-mounted stop lamp (HMSL) is built, because the optional spoiler prevents the signal of originally equipped HMSL from being seen. Since an electrical connector is removed from the original HMSL and connected with another HMSL in the optional spoiler (See the following drawing), the original HMSL never lights up. In a word, the original HMSL has no function in a car. Therefore, we think it is allowed to leave the original HMSL equipped in a car. (DRAWINGS OMITTED) Please let us know your opinion towords this matter. We are looking forward to your reply. Very truly yours, |
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ID: nht76-5.31OpenDATE: 11/01/76 FROM: CHARLES E. DUKE FOR JOHN W. SNOW -- NHTSA TO: House of Representatives TITLE: FMVSR INTERPRETATION TEXT: This is in response to your September 20, 1976, letter concerning record keeping with respect to new passenger cars that are damaged prior to retail sale. I would like to clarify the discussion of record requirements in my September 14, 1976, letter to you. While the National Highway Traffic Safety Administration (NHTSA) does not require vehicle manufacturers to create records of safety-related repairs that are made to new motor vehicles prior to sale, we do require the retention of all such records that are in fact created by the manufacturer. Through such records, the NHTSA can in many cases trace the history of vehicles suspected of containing safety-related defects. We have not to date found a safety need sufficient to justify further requirements specifically regarding identification of the vehicles in question. A copy of the record retention regulation, 49 CFR Part 576, is enclosed for your convenience. |
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ID: nht91-5.29OpenDATE: August 20, 1991 EST FROM: Jt Covelli -- President, Jt Covelli Marketing & Media TO: Taylor Vinson -- Legal Counsel, NHTSA TITLE: None ATTACHMT: Attached to letter dated 9-6-91 from Paul Jackson Rice to Jt Covelli (A38; Std. 108) TEXT:
Recently a woman in the creative department of my advertising agency saw a decal placed on the third brake light of a car in Illinois. The decal's backround was clear and in black bold letters was the name of the auto dealer. The letters appear only when the brake light is on and are only visible from a short distance. I have been advised by the Wisconsin D.O.T. that Wisconsin has no law governing the use of a decal on the third brake light. Is there a federal law allowing the use of a clear decal in this manner? My agency has a client we would like to present the idea to. We respectfully request your legal opinion in this matter. Thank you in advance for your consideration. Please feel free to call me with questions at 608 274-9906. I look forward to hearing from you. |
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.