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 |
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ID: nht72-6.12OpenDATE: 03/14/72 FROM: AUTHOR UNAVAILABLE; Lawrence R. Schneider; NHTSA TO: Automotive Service Industry Association TITLE: FMVSR INTERPRETATION TEXT: This is in reply to your letter of February 23, 1972, concerning the requirements of section 573.6 (Owner lists) of the Defect Reports regulations (49 CFR Part 573). In your letter you describe a situation where manufacturers perform modifications to heavy duty vehicles for dealers and may have difficulty, for competitive reasons, in obtaining the name of the ultimate purchaser. You ask that in this situation, these manufacturers be permitted, in meeting the requirements of section 573.6, to list the dealer as the "first purchaser," ". . . so that if a defect arises, the owners of record will be notified -- and, where applicable, the owners of record could notify the ultimate owners (usually warranty holders) of the defective vehicles." The requirement that an owner list be maintained under section 573.6 does not arise until a defect notification campaign is undertaken. The compilation of such a list at that time, however, would of necessity be based on some existing source of all owner names. One such source could be, and probably will be in most situations, a list compiled at the time of sale for warranty purposes. This is apparently the situation you have in mind. If a manufacturer has only the name of his dealer as the first purchaser, then we would consider using that name in his compilation as meeting the owner list requirement. The manufacturer would still be responsible for maintaining and updating the list as specified in section 573.6, and for obtaining the updated information from the dealer if it is the latter who is correcting the vehicles in question. If the manufacturer is making the corrections, of course, the updated information will be readily available to him. With regard to your assumption," . . . so that if a defect arises, the owners of record will be notified -- and, where applicable, the owners of record could notify the ultimate owners (usually warranty holders) of the defective vehicles," the requirement for notification of owners (Section 113 of the National Traffic and Motor Vehicle Safety Act) is separate from the requirement for compiling owners lists, and specifically excludes notification of dealers. While manufacturers may make arrangements with dealers and distributors for conducting notification campaigns, the ultimate responsibility for conducting the campaign lies with the manufacturer, and he does not meet this responsibility by merely notifying dealers. At the same time, we would expect to be notified at once should a dealer both insist on keeping his customer list confidential from the manufacturer and refuse otherwise to cooperate with the manufacturer, so that notification letters cannot be sent. |
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ID: nht76-1.19OpenDATE: 03/08/76 FROM: AUTHOR UNAVAILABLE; R. B. Dyson; NHTSA TO: Midland-Ross Corporation TITLE: FMVSS INTERPRETATION TEXT: This is in response to your January 30, 1976, letter requesting clarification of my March 7, 1975, letter concerning the relationship between Federal Motor Vehicle Safety Standard No. 106-74, Brake Hoses, and Military Specification MIL-H-3992C. My previous letter indicated that brake hose and brake hose assemblies sold to the military in conformity with MIL-H-3992C are, because of the provisions of 49 CFR 571.7(c), subject to neither the labeling nor the performance requirements of Standard No. 106-74. While Part 571.7(c) appears to exclude from the requirements of Standard No. 106-74 only that equipment which is sold directly to the Armed Forces, the NHTSA interprets this section as also excluding that equipment which is sold to military contractors, under contracts requiring it to conform to military specifications such as MIL-H-3992C, for installation in vehicles which are in turn sold directly to the military. We are considering the issuance of an interpretive amendment of Part 571.7(c) to this effect. YOURS TRULY, MIDLANDROSS February 3, 1976 Richard B. Dyson Assistant Chief Counsel U.S. Department of Transportation National Highway Traffic Safety Administration Further clarification of your March 7, 1975 letter to the undersigned (reference number N40-30 (MIS)) is requested with respect to the question of direct sales to the military. We, as a brake hose assembler, sell MIL-H-3992C specification hose to a vehicle manufacturer, the prime contractor for a military vehicle. Does this constitute selling "directly to, the Armed Forces of the United States in conformity with contractual specifications?" Does this further place the end-use control of the hose assemblies with the prime contractor? Rulings by you or your office would be appreciated on the above questions. Leon C. Huneke Chemical Engineer |
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ID: nht90-3.13OpenTYPE: Interpretation-NHTSA DATE: July 12, 1990 FROM: M. Michael Mascho -- Safety & Compliance Specialist, Kenworth Truck Company TO: Taylor Vinson -- NHTSA TITLE: None ATTACHMT: Attached to letter dated 8-30-90 from P.J. Rice to M.M. Mascho (A36; Std. 108) TEXT: I am requesting an interpretation of Federal Motor Vehicle Safety Standard No. 108; Lamps, reflective devices, and associated equipment. My concern is with Identification and Clearance Lamps listed in Table I, Required Motor Vehicle Lighting Equipment O ther Than Headlamps; and Table II, Location of Required Equipment. I have attached three (3) photos to better explain my concern. Kenworth Truck Company is a manufacturer of Class 7 & 8 trucks that are over 80" in overall width, thus falling into the requirements of the above mentioned tables. We manufacture a conventional model truck with a Aerodynes sleeper. The Clearance and I dentification Lamps are mounted on the top of the cab. (see the right hand truck in photo 1). We have been asked to build trucks that also include an extra set of Clearance and Identification Lamps on top of the sleeper. (see left hand truck in photo 1, and photos 2 & 3). The requirements of Tables I & II for Identification Lamps are three (3) amber lamps mounted as close as practicable to the top of the vehicle, or alternatively as close as practicable to the top of the cab. Identification Lamps are to be two (2) amber lamps mounted as near the top as practicable to indicate overall width. By mounting the extra lamps on top of the sleeper, we now have six (6) Identification Lamps and four (4) Clearance Lamps. This vehicle when viewed from the front at night would resemble a typical Class 8 truck pulling a trailer with front mounted Cleara nce and Identification Lamps. Would this vehicle be considered to be in compliance with Federal Motor Vehicle Safety Standard 108? Photographs attached to letter (graphics omitted). |
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ID: nht75-4.13OpenDATE: 08/25/75 FROM: AUTHOR UNAVAILABLE; F. Berndt; NHTSA TO: Dana Corporation TITLE: FMVSS INTERPRETATION TEXT: This responds to Dana Corporation's July 11, 1975, question whether a system which controls a truck engine throttle from a remote location by means of compressed air from the truck's brake system would violate the requirements of Standard No. 121, Air brake systems. The answer to your question is no. Standard No. 121 does not contain a prohibition on the use of air pressure from the air brake system for powering auxiliary devices. The vehicle must of course conform to Standard No. 121 following installation of the device, if the installation occurs prior to the first purchase in good faith for purposes other than resale. For example, the compressor build-up pressure would still be required to meet S5.1 of the standard. Although not a requirement of the standard, the NHTSA does consider it appropriate that a pressure protective valve be placed in the line to the auxiliary device so that a rupture of an auxiliary line does not cause depletion of air pressure in the brake system. SINCERELY, DANA CORPORATION . TECHNICAL CENTER July 11, 1975 Chief Council U.S. Department of Transportation We are presently involved with the design and development of a system used in the control of truck engine throttles. The system will require compressed air for its actuation which will be obtained from the air supply used in the vehicle's air brake system. This system will primarily be used on refuse packers during the pack cycle. The time per pack cycle will be one minute or less with a system's air consumption of .375 cubic feet at a regulated pressure of 35 pounds per square inch and having a free air flow of .358 cubic feet. With data available to you, I would like to know if, when using our system, the manufacturers will be in any violation of the FMVSS No. 121, Air Brake Systems. I am mostly concerned with paragraphs S5.1.1, S5.1.2, and S5.1.2.1 referring to compressors and reservoirs. Having this information, we can assure the truck manufacturers that our system will not in any way put them in jeopardy of any vehicle safety standards set forth by the U.S. Department of Transportation. If you have any questions, please feel free to contact me. Robert J. Ostrander Development Engineer |
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ID: JAPIA.ajdOpenKeiko Utsunomiya
Dear Ms. Utsunomiya: This is in reply to your e-mail letter of November 18, 2003, to Mr. Jonathan White of the National Highway Traffic Safety Administrations (NHTSA) Office of Defects Investigations requesting a clarification of several requirements of NHTSAs regulation on reporting of information and communications about potential defects, 49 CFR Part 579. In your e-mail to Mr. White, you asked whether a supplier has an obligation to report under the following scenario:
You also stated that your understanding of the above hypothetical is that supplier C does have an obligation to report to NHTSA and requested that we provide you with the legal authority to require that report. Your question is unclear as to what you understand supplier C needs to report to NHTSA. Based upon the facts in the hypothetical you present, it appears that you pose two questions. First, does a supplier of motor vehicle equipment have an obligation to report a recall campaign that is conducted by a vehicle manufacturer who does not sell motor vehicles in the United States? Pursuant to Subpart B of 49 CFR Part 579, supplier C would not have an obligation to report the recall of the vehicles with part X to NHTSA because OEM A, not supplier C, determined that a safety-related defect existed in part X. See 49 CFR 579.11. In addition, since a foreign government did not require supplier C to conduct a safety-related recall, supplier C is not obligated to report the recall. See 49 CFR 579.12. Second, does a supplier of motor vehicle equipment have to report a claim of a fatal accident received by a vehicle manufacturer who does not sell motor vehicles in the United States? Pursuant to Subpart C of 49 CFR Part 579, supplier C does not have an obligation to report the fatality claim, since the claim was made against and received by OEM A. See 49 CFR 579.27(b). If you have any questions, you may phone Andrew DiMarsico of my staff at (202) 366-5263. Sincerely, Jacqueline Glassman ref:579 |
2003 |
ID: nht91-4.6OpenDATE: May 28, 1991 FROM: Roddy Williams -- Container Enterprise TO: Paul J. Rice -- Chief Counsel, NHTSA TITLE: Reference: FMVSS No. 115 Vehicle Identification ATTACHMT: Attached to letter dated 7-12-91 from Paul Jackson Rice to Roddy Williams (A38; Std. 115; Part 571.7(f); VSA 108(a)(2)(A)) TEXT: Container Enterprise is a chassis manufacturer in New Orleans, La. and is registered with S.A.E. to apply VIN numbers. We are presently converting container chassis from their original 23' length to a new length of 27' which will enable them to conform to the new Federal Bridge Formula. Leasing companies have contracted us to modify these older chassis carrying a five digit VIN number. According to S.A.E., current regulations require a seventeen digit VIN number on any new and remanufactured productions. Any length change would also constitute a VIN number change. Explanation of Modification: The original chassis is 23' long. We remove the axles and half of the cross members on the original frame. We manufacture a 12' subframe and reinstall axles to the subframe. The subframe upon completion will extend the chassis length to 27'. The conversion will allow the chassis to slide open or closed. Upon completion of modification, Container Enterprise will issue a new manufacturer plate with a new VIN number and date of remanufacture. A remanufacture certificate of orgin is sent to the leasing company and the leasing company registers the chassis. It is our understanding after a telephone conversation with D. Nacoma with N.H.T.S.A. that the original manufacturer is no longer responsible after remanufacturing is completed. It is also our understanding that the remanufacturer assumes responsibility of the chassis meeting all of N.H.T.S.A. standards. According to the Department of the Treasury Publication 510, Excise Taxes, Page 10, Heavy Trucks, Trailers, & Tractor: F.E.T. is not taxable on remanufactured equipment. We feel that these procedures comply with all requirements and regulations. We would appreciate your review of these procedures and responding with any comments or opinions. Should you require additional information or clarification, please contact me at your convenience. |
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ID: 8624Open Mr. Daniel L. Kokal Dear Mr. Kokal: This is in reply to your letter of May 8, 1993, requesting use of continuous surety bonding for importation of nonconforming vehicles under the Registered Importer program. As you have informed us, "[c]urrently, single entry bonds are filed with each [nonconforming] vehicle at 150% of the vehicle's value . . . .", and that this is expensive for the importer of Canadian vehicles which "rarely, if ever, require safety modifications to meet U.S. standards." You propose a continuous bond which would cover more than one vehicle, with the same level of value. The example you give is that of a continuous bond of $150,000 which would cover 10 vehicles imported together, each with a value of $10,000 as determined by the U.S. Customs Service, rather than individual bonds for 10 vehicles of $10,000 value, each bond at $15,000. Your specific suggestion is for "the ability to import no more than 15 vehicles under a given continuous bond at 150% total vehicle value." We are unable to implement your suggestion at present. Under 49 CFR 591.8(a), the safety compliance bond's coverage is restricted to "only one motor vehicle." Thus, rulemaking is required to amend paragraph 591.8(a) to permit a bond that covers more than one vehicle. In addition, Appendix A to Part 591 will have to be modified; this sets forth the terms of the bond, presently expressed in single-entry terms. As NHTSA is required to reimburse Customs for its costs in processing safety compliance bonds, that agency must necessarily be consulted to determine the impact of such a change on its operations, with a possible change in the bond processing fee imposed under Part 594. However, the Office of Vehicle Safety Compliance will consider the feasibility of rulemaking on this subject. Sincerely, John Womack Acting Chief Counsel ref:591 d:6/4/93 |
1993 |
ID: nht93-4.22OpenDATE: June 4, 1993 FROM: John Womack -- Acting Chief Counsel, U.S. Department of Transportation, NHTSA TO: Daniel L. Kokal -- Champagne Imports TITLE: None ATTACHMT: Attached to letter dated 5-8-93 from Daniel L. Kokal to Johnathan Womack (OCC 8624) TEXT: This is in reply to your letter of May 8, 1993, requesting use of continuous surety bonding for importation of nonconforming vehicles under the Registered Importer program. As you have informed us, (c)urrently, single entry bonds are filed with each (nonconforming) vehicle at 150% of the vehicle's value . . . .", and that this is expensive for the importer of Canadian vehicles which "rarely, if ever, require safety modifications to meet U.S. standards." You propose a continuous bond which would cover more than one vehicle, with the same level of value. The example you give is that of a continuous bond of $150,000 which would cover 10 vehicles imported together, each with a value of $10,000 as determined by the U.S. Customs Service, rather than individual bonds for 10 vehicles of $10,000 value, each bond at $15,000. Your specific suggestion is for "the ability to import no more than 15 vehicles under a given continuous bond at 150% total vehicle value." We are unable to implement your suggestion at present. Under 49 CFR 591.8 (a), the safety compliance bond's coverage is restricted to "only one motor vehicle." Thus, rulemaking is required to amend paragraph 591.8 (a) to permit a bond that covers more than one vehicle. In addition, Appendix A to Part 591 will have to be modified; this sets forth the terms of the bond, presently expressed in single-entry terms. As NHTSA is required to reimburse Customs for its costs in processing safety compliance bonds, that agency must necessarily be consulted to determine the impact of such a change on its operations, with a possible change in the bond processing fee imposed under Part 594. However, the Office of Vehicle Safety Compliance will consider the feasibility of rulemaking on this subject. |
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ID: 08-006426drn.doc manufactured homesOpenMatt Wald, Director of Government Affairs Recreation Vehicle Industry Association 1896 Preston White Dr. P.O. Box 2999 Reston, VA 20195-0999 Dear Mr. Wald: This responds to your letter to National Highway Traffic Safety Administration (NHTSA) Deputy Administrator James Ports asking whether recreation vehicles manufactured by your members are motor vehicles. Your letter has been referred to my office for reply. We apologize that we could not find the original correspondence you sent in August 2008. You seek clarification that the appropriate jurisdiction over the class of vehicles known as recreation vehicles is with NHTSA and not with the U.S. Department of Housing and Urban Development (HUD). As explained below, recreation vehicles (RVs) that meet NHTSAs definition of a motor vehicle are motor vehicles under the National Traffic and Motor Vehicle Safety Act (49 U.S.C. Chapter 30101, Vehicle Safety Act) and are subject to NHTSAs regulation. However, please note that this conclusion may or may not preclude HUD from regulating the vehicles as manufactured homes. That issue must be determined by HUD, and this letter makes no comment about HUDs authority to regulate the vehicles. As you are aware, the Vehicle Safety Act authorizes NHTSA to issue Federal motor vehicle safety standards applicable to new motor vehicles and new items of motor vehicle equipment. An RV is subject to the authority of this agency if it is a motor vehicle under the Act. Motor vehicle is defined in the Act (49 U.S.C. 30102(6)) as: a vehicle driven or drawn by mechanical power and manufactured primarily for use on public streets, roads, and highways, but does not include a vehicle operated only on a rail line. In your letter, you stated that RVs include motor homes, fifth wheel trailers, travel trailers, folding camping trailers and truck campers. In an October 9, 2008 email to Ms. Dorothy Nakama of my staff, you further focused your question on RVs [that] are designed to be drawn by a vehicle without a special highway movement permit. I.e., they are designed and built to be a vehicle used on a highway on a daily basis. The RVs you describe would meet the Vehicle Safety Acts definition of motor vehicle, and thus are regulated by NHTSA as motor vehicles. RVs include motor vehicles that are motor homes (vehicles with motive power) and recreation vehicle trailers (trailers designed to be drawn by a vehicle with motive power).[1] I hope this information is helpful. If you have any further questions, please feel free to contact Dorothy Nakama at this address or by telephone at (202) 366-2992. Sincerely, Anthony M. Cooke Chief Counsel ref:VSA d.11/12/08 |
2008 |
ID: 77-2.37OpenTYPE: INTERPRETATION-NHTSA DATE: 05/18/77 FROM: AUTHOR UNAVAILABLE; Frank A. Berndt; NHTSA TO: Lansdale; Carr & Baum TITLE: FMVSR INTERPRETATION TEXT: This responds to your March 25, 1977, letter asking whether your proposed tire registration card to be used by your retail tire stores meets the requirements of 49 CFR Part 574, Tire Identification and Recordkeeping. The National Highway Traffic Safety Administration (NHTSA) does not issue advance approvals of compliance with agency standards or regulations. The agency will, however, give an informal opinion as to whether your registration card appears to satisfy the requirements of the regulation. The proposed card that you submitted is similar to the example presented in Figure 3 of Part 574. Accordingly, it appears to comply with most of the requirements of that regulation. The actual seller of the tires, however, is not identified on the form. Since Part 574.7 requires that the tire seller be identifiable to the tire manufacturer, the form should disclose that information. Naming only the corporate office is insufficient, since that does not readily identify the store through which the tire was sold. The NHTSA suggests that the actual seller's name and address be provided on the card as shown on Figure 3. It is our understanding that the tire seller will forward the cards to you who will then forward the information to the manufacturer. This process is acceptable to the NHTSA as long as the information is forwarded to the manufacturer within the time frame specified in Part 574.8. SINCERELY, Landsale, Carr & Baum advertising, marketing & management March 25, 1977 Francis Armstrong, Director Office of Standards Enforcement Motor Vehicle Programs US Department of Transportation National Highway Safety Adminstration We wish to submit the enclosed design for your approval to be used as a universal DOT identification card throughout our chain of retail tire stores. This card was designed to conform to the requirements of Section 574.8 of the department's directive on universal formats, dated May 22, 1971. We would appreciate hearing from you as soon as possible so that we can proceed with this project. Paul Ideker (Graphics omitted) (Illegible Text) FIG 3. UNIVERSAL FORMAT @ 574.8 Information requirements -- tire distributors and dealers. (a) Each distributor and each dealer selling tires to tire purchasers shall submit the information specified in @ 571.7 (a) to the manufacturer of the tires sold, or to the manufacturer's designee. (b) Each tire distributor and each dealer selling tires to tire purchasers shall forward the information specified in #571.7(a) to the tire manufacturer, or person maintaining the information, not less often than every 20 days. However, a distributor or dealer who sells less than 10 tires, of all makes, types and sizes during a 30 day period may wait until he sells a total of 10 tires, but in the event longer than 6 months before forwarding the tire information to the respective tire manufactures or their designee. (c) Each distributor and each dealer selling tires to other tire distributors and dealers shall supply to the tire distributor or dealer to whom he sells tires a (Illegible Words) the information specifical in @ 571.7(a), unless such a means has been provided to that distributor or dealer by (Illegible Word) person or by a manufacturer. (d) Each distributor and each dealer shall immediately stop selling any group of tires when so directed by a notification issued pursuant to Section 113 of the Act (13 U.S.C. 1102). @ 574.9 Requirements for motor vehicle dealers. (a) Each motor vehicle dealer who sells a used motor vehicle for purposes other than resale, or who leases a motor vehicle for more than (Illegible Word) days, that is equipped with new tires or newly retreated tires (Illegible Word) for purposes of this |
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.