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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 1241 - 1250 of 16505
Interpretations Date
 

ID: aiam4370

Open
Mr. Philip T. Kelly, Associate Superintendent for Administrative Services, Rock Hill School District Number Three, P.O. Drawer 10072, 522 East Main Street, Rock Hill, SC 29731; Mr. Philip T. Kelly
Associate Superintendent for Administrative Services
Rock Hill School District Number Three
P.O. Drawer 10072
522 East Main Street
Rock Hill
SC 29731;

Dear Mr. Kelly: This responds to your letter to the National Highway Traffic Safet Administration (NHTSA) asking two questions about the applicability of our school bus safety standards to vans. I apologize for the delay in our response.; Before I begin to answer your specific questions, it might be helpfu to provide some background information on our school bus regulations. Our agency has two sets of regulations for school buses. The first set, issued under the authority of the National Traffic and Motor Vehicle Safety Act, applies to the manufacture and sale of new motor vehicles and includes the motor vehicle safety standards for new school buses. We believe that those motor vehicle safety standards for school buses are the 'school bus regulations' to which you refer in your letter.; In general, the parties subject to the Vehicle Safety Act ar manufacturers and sellers of new school buses. The Act requires manufacturers to certify that their vehicles meet all Federal safety standards applicable to buses and also those specifically applicable to 'school buses.' Further, under the Vehicle Safety Act, each person selling a new bus to a school must ensure that the bus complies with our motor vehicle safety standards for school buses or be potentially subject to fines under Federal law. Because the Vehicle Safety Act applies to the manufacture and sale of new motor vehicles and not to vehicle use, there is no Federal prohibition directed against a school or school district that uses noncomplying buses to carry school children.; NHTSA issued the second set of 'regulations' for school buses under th authority of the Highway Safety Act. Those regulations, or 'highway safety program standards,' are recommendations from this agency to the states for developing their highway safety programs. Highway Safety Program Standard No. 17, *Pupil Transportation Safety* (copy enclosed) includes recommendations for the operational aspects of state pupil transportation programs, such as school bus identification, maintenance and driver training. Individual states have chosen to adopt some or all of the guidelines as their own policies governing their highway safety programs. A state that has adopted this standard might have specifications applying to small 'vans' used as school vehicles. Because the issue is one concerning state law, South Carolina officials would be able to provide you with more information on state requirements for the operation of smaller school vehicles.; With this background, I will now address your specific questions. You first question asked whether a vehicle carrying 11 or fewer persons (driver included) must conform to Federal school bus requirements. our regulations issued under the Vehicle Safety Act specify that a new vehicle designed for carrying 11 or more persons (including the driver) is considered a 'bus,' and is considered to be a 'school bus' if sold for school-related purposes. If a new vehicle is designed for carrying *10* or fewer persons, it is considered under our regulations to be either a 'passenger car' or a 'multipurpose passenger vehicle' (MPV). We do not prohibit the sale of MPV's to carry school children nor do we require them to comply with Federal school bus safety standards. Instead, they must meet safety standards applicable to MPV's.; Your second question was 'Can a van designed for 14 passengers b redesigned for 10 passengers and not be required to meet Federal school bus requirements?' Before I explain the consequences under Federal law of removing seats from a 14-passenger bus, I would like to reiterate that our authority under the Vehicle Safety Act does not extend to the use of school buses by school districts or individual schools. Therefore, Federal law does not require your school district to use only complying school buses or to restrict the seating in your 14-passenger vans to take them out of our 'school bus' category. While persons selling your school district new 14-passenger vans *are obligated to sell* buses which conform to our school bus safety standards, transporters of school children are not required by the Vehicle Safety Act to ensure that all their vehicles designed for seating 11 or more persons comply with Federal school bus safety standards. I would also like to point out that the following discussion concerns only whether the modification you described would be permitted under our statutes and regulations. Since the States set their own operational requirements for school vehicles, you should contact South Carolina officials to determine the consequences of such a modification under State law.; In general, the answer to your question is yes. However, if the seat are removed by a commercial business such as a motor vehicle dealer or distributor, there are Federal restrictions on the way the modification may be made. Also, separate considerations arise depending on whether the seats are removed before the vehicle's first sale (i.e., from a new vehicle) or after its first sale (from a used vehicle).; Altering a 14-passenger bus by removing some of its seats so that i would no longer have a passenger capacity that would classify it as a bus is, in theory, permissible. If a manufacturer or dealer reduces the passenger capacity of a *new* bus to less than 10 *before* the vehicle is sold or delivered to the owner, that manufacturer or dealer is considered an 'alterer' under our regulations. By so reducing the passenger capacity, the vehicle's classification would be changed from a bus to an MPV. Accordingly, the alterer would be required to certify that the vehicle complies with all of the Federal safety standards applicable to MPV's. Among other things, this would require the alterer to install safety belts at all seating positions.; If the modifications were made after the vehicle's first purchase, ou regulations on vehicle alteration would no longer apply. However, modifications to used vehicles are subject to a statutory restriction. Specifically, section 108(a)(2)(A) of the Vehicle Safety Act prohibits motor vehicle manufacturers, distributors, dealers and repair businesses from knowingly rendering inoperative equipment or designs that are incorporated in motor vehicles in compliance with Federal motor vehicle safety standards. This means that a commercial modifier in any of the above categories may remove seats in your vehicle, but must ensure that the vehicle continues to comply with all applicable Federal safety standards after the seats have been removed. The Safety Act specifies a civil penalty of up to $1,000 for any person who violates section 108(a)(2)(A). Neither the prohibition against rendering inoperative in S108(a)(2)(A) of the Safety Act nor our regulations issued under the Safety Act applies to an owner modifying his or her own vehicle. Therefore, if your school district chooses to reduce the passenger capacity of your vehicles, you may perform the work on your own vehicles without regard to any Federal regulations administered by this agency. Again, however, you should ensure that the modification is done in conformance with any applicable South Carolina laws.; I hope this information is helpful. Please contact us if you hav further questions.; Sincerely, Erika Z. Jones, Chief Counsel

ID: aiam1172

Open
Mr. Timothy J. Kincaid, Silber, Pickus & Williams, 1505 Investment Plaza, Cleveland, OH 44114; Mr. Timothy J. Kincaid
Silber
Pickus & Williams
1505 Investment Plaza
Cleveland
OH 44114;

Dear Mr. Kincaid: This is in response to your June 19, 1973, request for samples of th odometer disclosure form described in Part 580, *Odometer Disclosure Requirements*, 49 CFR S 580.6, and for the correct sequence in which to execute the mileage statement and the transfer of ownership.; The Act requires disclosure of odometer readings, but the regulation issued do not require the use of a federally-printed form, and the government therefore does not provide such forms. The use of a commercially-prepared form is satisfactory if it contains the required information, as it appears in the sample format of S 580.6. The document does not have to be separate from other transfer documents, and in the case of a transferor using a bill of sale or other transfer document, the statement may be included within the form. Either the original or a carbon copy may be given to the transferee.; Section 580.4(a) requires a transferor to furnish the statement 'Befor executing any transfer or ownership document' and include the odometer reading at the time of transfer and the date of transfer. To accomplish this, the statement must precede the transfer and should be executed on the date of transfer to reflect an accurate mileage and date. The date of the statement would then function as the date of transfer.; Yours truly, Richard B. Dyson, Assistant Chief Counsel

ID: aiam4720

Open
Mr. Patrick S. Baran I.D.E.A. 2340 W. Belmont Chicago, IL 60618; Mr. Patrick S. Baran I.D.E.A. 2340 W. Belmont Chicago
IL 60618;

Dear Mr. Baran: This is in reply to your letter to Taylor Vinson o this Office, with respect to 'D.O.T. guidelines for tail light brightness' with respect to a 'brake light for the back of a motor cycle helmet.' I regret the delay in responding. The Department has no authority to 'approve' or 'disapprove' items of equipment, but we can provide guidance on the relationship of equipment to the Federal motor vehicle safety standards. I enclose a copy of a l982 interpretation with respect to a similar device, a headlamp intended for installation on a motorcycle helmet. It also represents our views with respect to your device. I enclose also a copy of SAE Standard J586c Stop Lamps, which our Rulemaking office promised you. We note that you use the term 'tail light' and 'brake light' interchangeably. In seeking State guidance you should be clear as to whether your device indicates the presence of the cyclist (taillamp), or the application of the brakes of the motorcycle (stop lamp), or both. Sincerely, Stephen P. Wood Acting Chief Counsel Enclosure;

ID: aiam1522

Open
Mr. C. J. Kidwell, American Safety Equipment Corp., 16055 Ventura Boulevard, Encino, CA 91316; Mr. C. J. Kidwell
American Safety Equipment Corp.
16055 Ventura Boulevard
Encino
CA 91316;

Dear Mr. Kidwell: This is in reply to your letter of May 29, 1974, concerning th labeling requirements of Standard No. 218, *Motorcycle Helmets*. You ask for our 'review, comments, interpretation, recommendations, and opinions' on two test reports you had done with respect to the placement of the DOT symbol and its attachment on helmets manufactured to the standard's requirements.; The National Highway Traffic Safety Administration does not provid approval of any item of motor vehicle equipment as conforming to any motor vehicle safety standard. Each item is required to conform, and each manufacturer must determine, by methods within his discretion, whether his product conforms to a standard. With respect to the method of affixing the DOT label to the helmet, any methods that are reasonably designed to provide a label that is clearly legible for the expected life of the helmet would be satisfactory.; We would like to point out, however, that from the photograph an drawings you enclosed, it appears that the DOT symbol on your helmet is partially obscured by a goggle snap and its related material. We do not consider this obscuring of the DOT symbol to conform to the intent of the standard. Accordingly, we recommend that you either reduce the length of the snap and its related material or raise the symbol to attain complete visibility.; Yours truly, Richard B. Dyson, Assistant Chief Counsel

ID: aiam3270

Open
Mr. Woody Fitzmaurice, Supervisor, Pupil Transportation, State of Missouri, P.O. Box 480, Jefferson City, MO 65102; Mr. Woody Fitzmaurice
Supervisor
Pupil Transportation
State of Missouri
P.O. Box 480
Jefferson City
MO 65102;

Dear Mr. Fitzmaurice: This responds to your recent letter asking whether the State o Missouri has authority under Federal law to specify location requirements for fuel tanks on school buses.; Section 103(d) of the National Traffic and Motor Vehicles Safety Act as amended 1974 (15 U.S.C. 1392(d)) preempts, with one exception, State motor vehicle safety standards of general applicability that are not identical to a Federal safety standard governing the same aspect of motor vehicles performance. Thus, Federal Motor Vehicle Safety Standard No. 301, *Fuel System integrity* (49 CFR 571.301), would preempt State requirements of general applicability governing the same aspect of performance as Standard No. 301. The specification of tank location in the Missouri requirements is intended to insure the integrity of the vehicle fuel system and, therefore, would be regarded by the agency as relating to the same aspect of performance as the barrier impact tests of Standard No. 301. In developing the performance requirements of the standard, the agency did not intend to regulate the location of fuel tanks.; The second sentence of section 103(d) of the Act clarifies that th limitation State safety regulations of general applicability does not prevent governmental entities from specifying additional safety features in vehicles purchased for their own use. Thus, the State of Missouri or its political subdivisions such as the Board of Education could specify additional fuel system requirements, such as tank location, in the case of public school buses, but not in the case of commercial buses. The State requirements are not permitted, however, to prevent the school bus or equipment from complying with applicable safety standards. Therefore, the school bus manufacturer would have to comply with Safety Standard No. 301 regardless of the State requirements.; I hope this has answered all of your questions. However, if you requir further information, please contact Hugh Oates of my staff (202-426-2992); Sincerely, Frank Berndt, Chief Counsel

ID: aiam2898

Open
Mr. George I. Whiston, British Standards Institution, Head Office, 2 Park Street, London WIA 2BS; Mr. George I. Whiston
British Standards Institution
Head Office
2 Park Street
London WIA 2BS;

Dear Mr. Whiston: Please excuse the long delay in responding to your letter abou materials incorporated by reference in the Federal motor vehicle safety standards. Your primary concern is the correct version of the referenced materials to be used in conducting compliance tests if the materials are subject to change.; As you noted, Part 571.5 (CFR 571.5) of our regulations provides, i pertinent part, 'Materials subject to change are incorporated as they are in effect on the date of adoption of this part, unless the reference to them provides otherwise.' Almost all safety standards incorporating materials by reference specifically refer by month and year to a particular version of the referenced material. Therefore, the specified version should be used for compliance test purposes, even if the organization that adopted the reference material has published an updated version. If the reference does not identify a specific version, the version in effect when the safety standard was issued should be used for compliance testing.; As you pointed out, many of the voluntary industry standards do no have an 'effect date.' To determine which version was 'in effect' on the date the Federal safety standard incorporating the material was issued, the agency looks to the version adopted by the organization that developed the material as of that date. For example, the Society of Automotive Engineers Standards do not have an effective date, but they do have an identifying month and year which indicates when the latest version was approved by the appropriate SAE approval body. The agency would look at that identifying month and year to determine which version was in effect on the issuance date of the safety standard or amendment.; Regarding your request for a list of the effective dates of the Federa safety standards, please be aware that the standards are being continually amended and the new provisions have their own effective dates. Thus, there is no single effective date for each standard. The enclosed computer printout provides a listing of the effective dates of the safety standards and their amendments as of July 1978. You are correct in your assumption that the safety standards only apply to vehicles manufactured on or after the effective date of relevant standard.; Finally, the effective date of a safety standard does not have an bearing on which edition of materials incorporated by reference is applicable. The version used for compliance testing is the version specifically referred to in the standard by date or, if there is no date specification, the version which was in effect on the date of issuance of the safety standard.; If you have any further questions, I will be pleased to answer them. Sincerely, Joseph J. Levin, Jr., Chief Counsel

ID: aiam2932

Open
Mr. Heinz W. Gerth, Mercedes-Benz, P.O. Box 350, Montvale, NJ 07645; Mr. Heinz W. Gerth
Mercedes-Benz
P.O. Box 350
Montvale
NJ 07645;

Dear Mr. Gerth:#This is in response to your letter of November 27 1978, requesting an interpretation of Federal Motor Vehicle Safety Standard No. 101-80, *Controls and Displays*. Specifically, you asked whether it is permissible to use symbols for the parking lamp functions of the headlamp switch, in addition to the headlamp symbols required in Table I of the Standard.#The answer to your question is yes. Section 5 of the standard states that each passenger car 'with any control listed in S5.1 or in column 1 of Table 1, ... shall meet the requirements of this standard for the location, identification, and illumination of such control or display.' Since no symbols or other designations are required under the standard for parking lamps where their control is not combined with that for headlamps or for 'lamps-off' positions on controls, it is up to the manufacturer whether to label these additional functions and whether to use words or symbols. Footnote 2 of Table 1 of the standard does provide that a manufacturer must use the single headlamp symbol to designate several functions when clearance, identification, parking and/or side marker lamps are all controlled with the headlamp switch. This footnote was not intended to preclude additional symbols for these other functions, however. In fact, S5.2.1 provides that 'additional words or symbols may be used at the manufacturer's discretion for the purpose of clarity.'#Regarding your drawings, clearance lamps are listed in paragraph S5.1 and in column 1 of Table 1 of the standard. Therefore, they must be identified by the symbols shown in column 3 of Table 1 or by the words 'Clearance Lamps' or 'Cl Lps'. The 'parking right and left' symbol shown on the drawing submitted with your letter would not satisfy the requirements for clearance-lamp designations. However, the symbol labeled 'Clearance Lamps' that appears on the drawings which Mr. Gebhard M. Hespeler and Mr. Craig Jones submitted on December 20, 1978, would conform with the requirements. I have enclosed a copy of that drawing.#If you have any further questions, please do not hesitate to write.#Sincerely, Joseph J. Levin, Jr., Chief Counsel;

ID: aiam3620

Open
Mr. Harry Epstein, Kastar, Inc., Station Road at Sunrise Highway, Bellport, NY 11713; Mr. Harry Epstein
Kastar
Inc.
Station Road at Sunrise Highway
Bellport
NY 11713;

Dear Mr. Epstein: This responds to your letter of October 1, 1982 (and letter of Augus 31, 1982) requesting information concerning the Federal requirements applicable to auxiliary wind deflectors for passenger car doors. Your letter states that Mr. Kevin Cavey of this agency indicated that plastic wind deflectors do not have to meet any government regulations.'; We apologize, but the information given to you by Mr. Cavey wa incorrect. The National Traffic and Motor Vehicle Safety Act, as amended 1974 (the Act), authorizes the National Highway Traffic Safety Administration to issue Federal motor vehicle safety standards which are applicable to motor vehicles or motor vehicle equipment. The wind deflectors you plan to manufacture are pieces of motor vehicle equipment, and they are subject to Safety Standard No. 205, *Glazing Materials* (copy enclosed).; Incorporating by reference ANS Z26,' the American National Standard' Safety Code for Glazing Materials, Safety Standard No. 205 specifies performance requirements for various types of glazing and also the locations in vehicles in which each type of glazing may be used. Under the requirements of this standard, an auxiliary wind deflector to be used on a passenger vehicle at levels requisite for driving ability may be manufactured out of either Item 1, Item 2, Item 4, Item 10, or Item 11 glazing materials, depending upon its proposed location on the vehicle (the various types of glazing are designated as Items' in the standard). The acrylic plastic material you propose to use is probably an Item 4 glazing, which may be used as a wind deflector placed on the side window of a vehicle. An AS-4 glazing material must meet Test No. 2, Luminous Transmittance,' which requires that the material show regular (parallel) luminous transmittance of not less than 70 percent irradiation.' You will have to make the determination whether your material in fact qualifies as an Item 4 material, or any of the other Item numbers mentioned above.; Safety Standard No. 205 also sets forth specific certification an marking requirements. The requirements for prime glazing material manufacturers (those who fabricate, laminate, or temper the glazing material) are set out in paragraphs S6.1-S6.3. While not explicitly stated in your letter, it appears that you do not manufacture the glazing to be used in your deflector, but instead purchase it from a prime glazing manufacturer and then cut it yourself. If this assumption is correct, then the certification and marking requirements applicable to you are of ANS Z26, you are required under this paragraph to mark any section of glazing that you cut with the same words, designations, characters, and numerals as the piece of glazing from which it was taken. This means that you would stamp your product with markings identical to those found on the acrylic sheets you purchased. Each item must also be certified pursuant to Section 114 of the Act. Section 114 provides that an item of motor vehicle equipment may be certified by means of a label or tag on the item or on the outside of a container in which the equipment is delivered. The label or tag must state that the item of motor vehicle equipment complies with all applicable motor vehicle safety standards, which in this case would be Safety Standard No. 205.; Under Section 108(a)(1)(A) and (b)(1) of the Act, new motor vehicl equipment such as wind deflectors must comply with applicable safety standards prior to its first purchase by someone for purposes other than resale. The manufacture or installation of a wind deflector that does not conform to the standard, or the installation in a new vehicle in a location that is not provided for in Standard No. 205, would be a violation of Section 108(a)(1)(A). Under Section 109, anyone who violates Section 108(a)(1)(A) is subject to a civil penalty up to $1,000 for each violation.; Manufacturers of motor vehicle equipment also have responsibilitie under the Act regarding safety defects. Under Section 151 *et* *seq*., such manufacturers must notify purchasers about safety-related defects and remedy such defects free of charge. Again, Section 109 imposes a civil penalty of up to $1,000 upon any person who fails to provide notification of or remedy for a defect in motor vehicle equipment.; We hope you find this information helpful. Please contact Hugh Oates o this office if you have any more questions (202-426-2992).; Sincerely, Frank Berndt, Chief Counsel

ID: aiam2461

Open
Mr. Robert B. Kurre, Director of Engineering, Wayne Corporation, Industries Road, Post Office Box 1447, Richmond, IN 47374; Mr. Robert B. Kurre
Director of Engineering
Wayne Corporation
Industries Road
Post Office Box 1447
Richmond
IN 47374;

Dear Mr. Kurre: This is in response to your letter of November 15, 1976, in which yo ask whether emergency exits installed in school buses beyond those required in S5.2.3 of Standard No. 217, *Bus Window Retention and Release*, must meet the requirements of the standard.; The NHTSA has determined previously that only those exits required i S5.2.3 must meet the requirements specified for school bus emergency exits in Standard No. 217. All other emergency exits installed in school buses must comply with the requirements for emergency exits in buses other than school buses. These requirements are detailed in Standard No. 217.; In your letter, you ask specifically whether S5.2.3.1(b), S5.3.1 S5.3.2, S5.3.3, S5.4.1, S5.4.2.1(b) or S5.5.3 apply to a side emergency door in a school bus that already complies with S5.2.3.1(a) of the standard. The NHTSA concludes that this door would be required to comply with S5.3.1, S5.3.2, and S5.4.1 of the standard.; Sincerely, Frank A. Berndt, Acting Chief Counsel

ID: aiam2031

Open
Mr. Jack Johnson, 8400 East Slauson Avenue, Pico Rivera, CA 90660; Mr. Jack Johnson
8400 East Slauson Avenue
Pico Rivera
CA 90660;

Dear Mr. Johnson: This responds to Motac's August 7, 1975, request for a determinatio that two platform trailers which are designed with a primary cargo-carrying surface which is less than 40 inches above the ground would qualify for exclusion from the requirements of Standard No. 121, *Air Brake Systems*, if manufactured before September 1, 1976.; I have enclosed a copy of the amendment to Standard No. 121 whic excludes heavy hauler trailers from the requirements of the standard until September 1, 1976. You should note that the '40-inch cargo-carrying surface' criterion is measured in the unloaded condition, and that the body must not be equipped with sidewalls unless they are easily removable.; There is no requirement that the vehicle be designed for a certain typ of cargo such as heavy machinery. Therefore your semi-trailers may qualify for the exclusion if they meet the criteria listed in the definition of heavy hauler trailer.; Sincerely, James B. Gregory, Administrator

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.