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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 14831 - 14840 of 16517
Interpretations Date

ID: nht71-1.32

Open

DATE: 08/25/71

FROM: AUTHOR UNAVAILABLE; Lawrence R. Schneider; NHTSA

TO: Honiron

TITLE: FMVSR INTERPRETATION

TEXT: This is in reply to your letter of June 17, 1971, concerning the notice published April 14, 1971 (36 F.R. 7054) amending the Certification regulations (49 CFR Part 567) and establishing regulations governing "Vehicles Manufactured in Two or More Stages" (49 CFR Part 568). You ask whether as a trailer manufacturer you need comply only with the requirements of @ 567.4(g)(1) at present, and need not comply with @@ 567.4(g)(2) through 567.4(g)(7) until October 1, 1972. The answer to this question is no. The amendment to the regulations on which your question is based merely added the requirements of @@ 567.4(g)(1)(iii) 567.4(g)(3), and 567.4(g)(4) to existing requirements that have been in effect since September 1, 1969 (copy enclosed). Thus, the requirements of @@ 567.4(g)(1)(i) and (ii), and 567.4(g)(2), (g)(5), (g)(6) and (g)(7) (as they appear in the notice of April 14, 1971) have been in effect since September 1, 1969. Of the new provisions @ 567.4(g)(1)(iii) did become effective June 1, 1971. The effective date of the other new provisions has been corrected to January 1, 1972, by a notice published April 27, 1971 (36 F.R. 7855), a copy of which is also enclosed.

You are correct in interpreting "gross vehicle weight rating" as it applies to trailers to exclude the weight of the tractor or other towing vehicle. It includes as you state only the weight of the fully loaded trailer. You are also correct in interpreting "gross axle weight rating" as it applies to trailers to apply to only the weight applied to the axle of the trailer. It does not include the weight applied to any part of the towing vehicle.

If you have further questions, please let us know.

ID: nht71-1.33

Open

DATE: 04/20/71

FROM: AUTHOR UNAVAILABLE; Francis Armstrong; NHTSA

TO: WARREN M. BARNETT

TITLE: FMVSR INTERPRETATION

TEXT: This is in reply to your letter of February 23, 1971, requesting advice on the acceptability of your regrooving pattern for regrooved tires.

Enclosed is a copy of the Rules and Regulations on regrooved and regroovable tires as it appears in the Federal Register published January 24, 1969, under Section 369.7(a)(1) Requirements, "After regrooving, the new grooves generated into the tread material and any residual original molded tread groove which is at or below the new regrooved groove depth, shall have a (Illegible Word) of 90 linear inches of tread edges per linear foot of tire circumference."

There are no measurements on your drawings to assist us in determining if your zig-zag grooves and the three circumferencial grooves measure 90 linear inches. Three straight circumferential grooves would only provide approximately 72 linear inches.

The use of lateral cuts should substantially increase the tread edge measurements; providing the lateral cuts are from shoulder to shoulder to allow unobstructed fluid escape passages as required in Section 369.7(a)(5).

Thank you for your interest in tire safety.

Enclosure

ID: nht71-1.34

Open

DATE: 01/16/71

FROM: CHARLES H. HARTMAN FOR DOUGLAS W. TOMS -- NHTSA

TO: LYNN E. TA TAKAGELL

TITLE: FMVSR INTERPRETATION

TEXT: (Illegible Words)

ID: nht71-1.35

Open

DATE: 12/02/71

FROM: RICHARD B. DYSON For Lawrence R. Schneider -- NHTSA

TO: G & D Communications Corporation

TITLE: FMVSR INTERPRETATION

TEXT: This is in reply to your letter of October 22, 1971, and your phone call to Michael Peskoe of November 15, 1971, requesting a copy of the Consumer Information regulations and asking what penalties may be imposed on manufacturers if their vehicles cannot perform as well as the figures they provide pursuant to the regulation. You stated in the above conversation that you have obtained the volume entitled "Performance Data for New 1971 Passenger Cars and Motorcycles" which contains a copy of the Consumer Information requirements. I have enclosed certain amendments to the Consumer Information regulations which will bring the regulations as they appear in this volume up to date.

With reference to your question regarding penalties for violations of the Consumer Information requirements, Section 108 and 109 of the National Traffic and Motor Vehicle Safety Act of 1966 (15 U.S.C.@@ 1397, 1398) authorize the imposition of civil penalties of up to $ 1,000 per violation, and up to $ 400,000 for any related series of violations, against manufacturers whose vehicles cannot perform at least as well as the data they supply indicates. In addition, injunctive proceedings may be utilized pursuant to section 110 of the Act (15 U.S.C.@ 1399).

I trust this answers your question. We regret that it was over-looked in our first response to your letter.

ID: nht71-1.36

Open

DATE: 04/21/71

FROM: AUTHOR UNAVAILABLE; Lawrence R. Schneider; NHTSA

TO: Department of the Air Force

TITLE: FMVSR INTERPRETATION

TEXT: Secretary Volpe has asked me to reply to your letter of April 2. Section 108(b)(4) of the National Traffic and Motor Vehicle Safety Act of 1966 states that the "temporary importation of any motor vehicle" is permissible, and you ask "if any joint regulations have been established between the Secretary of the Treasury and your department establishing a maximum period of time or a definite period of time in which any vehicle may be imported into the United States, whether or not it meets the safety standards set forth."

Joint regulations (19 C.F.R. @ 12.80) were adopted in 1968 and I enclose a copy for your information. Obviously we have to objection to a vehicle remaining in the United States and used upon the public roads indefinitely if it meets all applicable Federal motor vehicle safety standards. The word "temporary" within the meaning of section 108(b)(4) does, however, have differing meanings for vehicles which do not met Federal standards and which are imported under different circumstances. Section 12.80(b)(2)(iii) and (c) allow importers not otherwise exempted 90 days in which to bring a noncomplying vehicle into compliance and permit an extension of time if circumstances warrant. A non-resident of the United States is permitted by subsection (b)(2)(v) to import a noncomplying vehicle for a period of up to one year. Foreign diplomatic and military personnel are allowed by subsection (b)(2)(vi) to import their noncomplying vehicles for the duration of their stay and must declare that they will not sell their vehicles in the United States during that time. On the other hand, a noncomplying vehicle imported solely for purpose of show test, experiment, competition, or repairs, may be admitted indefinitely pursuant to subsection (b)(2)(vii) if it is not sold or licensed for use on the public roads.

These regulations do not apply to vehicles manufactured before January 1, 1963. We advise military personnel not to purchase vehicles produced after that date and manufactured for the European market as the conversion costs are prohibitive in many instances. We also advise them that vehicles which are alleged to have been converted to meet U.S. safety specifications in most instances do not. The best evidence of compliance with U.S. requirements is the certification of that fact, generally affixed by the original manufacturer to the door post on the driver's side of the vehicle. I enclose a booklet on the importation of motor vehicles for your guidance, and I will be happy to answer any further questions you may have.

ID: nht71-1.37

Open

DATE: 06/15/71

FROM: LAWRENCE R. SCHNEIDER -- NHTSA

TO: Messrs. Hill; Lewis; Adams; Goodrich & Tait

TITLE: FMVSR INTERPRETATION

TEXT: This is in reply to your letter of May 10 to Francis Armstrong, Director of the Office of Standards Enforcement, on behalf of Vehicle Industries, Inc. Your client wishes to import dune buggy chasses, either in kit or assembled form, for sale to a distributor-dealer organization and subsequent resale by them to retail customers who will complete the final manufacture of the incomplete vehicle as a dune buggy. You have asked questions concerning compliance with Federal motor vehicle safety standards ("safety standards") and other regulations.

Your letter indicates that you are familiar with our two Mini-Bike Interpretations and the criteria we use in determining whether a vehicle is a "motor vehicle" as defined in section 102(3) of the National Traffic and Motor Vehicle Safety Act of 1966 (the "Act"). There have been no further additions to these Interpretations. We view a dune buggy as a "motor vehicle" primarily because it is licensable for use on the public roads. Conversely all-terrain vehicles, snowmobiles, and some categories of mini-bikes are not considered "motor vehicles" because of State statutory prohibitions forbidding their registration for on-road use. Because a dune buggy is constructed with "special features for occasional off-road use" it is a "multipurpose passenger vehicle" ("MPV") under the safety standards, and must, at the time of its manufacture, comply with all safety standards applicable to MPVs. Equipping a vehicle with speed restrictive components would not affect this opinion unless the equipment rendered the completed vehicle unlicensable for on-road use.

Until January 1, 1972, the product Vehicle Industries wishes to import, either in kit form or as an assemolage, is considered "motor vehicle equipment" under the Act. It is not a chassis-cab, as you suggested, because it has no cab. Since section 102(5) of the Act includes an importer in the definition of "manufacturer." Vehicle Industries is considered the manufacturer of the motor vehicle equipment it imports, and responsible for compliance of that equipment with applicable safety standards.

Regulated equipment items for MPVs and corresponding safety standards are: brake hoses and brake hose assemblies (Standard No. 106), brake fluid (No. 116), glazing (No. 205), seat belt assemblies (No. 209), and wheel covers (No. 211). If the kit or assemblage contains any of these items, the item must comply upon inportation, and Vehicle Industries must provide certification to the distributor-dealer that the equipment item meets the appropriate safety standard. The certification obligation is imposed by section 114 of the Act as amplified by a notice published on November 4, 1967, copy enclosed. There are no other labeling or informational obligations. The requirements of this paragraph remain in effect after January 1, 1972, to any dune buggy chassis imported in kit form.

If the chassis is imported in assembled form, on and after January 1, 1972, Vehicle Industries as importer - manufacturer of an assemblage will be considered an "incomplete vehicle manufacturer" and the assemblage an "incomplete vehicle" as those terms are defined in 49 CFR Part 568, the regulations governing vehicles manufactured in two or more stages. I enclose a copy of Part 568 for your guidance and call your attention to @ 568.4, requirements for incomplete vehicle manufacturers. Section 568.4(a)(7) will require Vehicle Industries to provide with the incomplete vehicle a list of those standards applicable to MPVs, together with one of three appropriate statements for each such standard. If Vehicle Industries has provided certification prior to January 1, 1972, covering an equipment item in the assemblage, for instance brake hoses, the appropriate statement on and after January 1, 1972 would appear to be set out in @ 568.4(a)(7)(i), that the vehicle when completed will comply with Standard No. 106, Brake Hose and Brake Hose Assemblies, if the final assembler makes no change in the brake hoses or brake hose assemblies. You ask if these regulations may be followed as a "guideline" before January 1, 1972. Because the @ 568.4(a)(7)(i) statement is a representation of compliance, it is a de facto certification of compliance and, in my opinion, Vehicle Industries may provide such a @ 568.4(a)(7)(i) statement in advance of January 1, 1972, that includes a regulated equipment item, to satisfy the existing equipment certification requirement.

You have also asked if it is possible to "retail the unit in its present form with an item of equipment on it" that doesn't comply with the safety standards. The answer is no, if that item is directly regulated by a safety standard. However, if a safety standard applies to vehicle categories only - and most of them do - then an item encompassed in that safety standard need not comply until time of final assembly. For example, Standard No. 107, Reflecting Surfaces, applies to MPVs and passenger cars, and not to the equipment items specified therein. Consequently, the horn ring and steering wheel assembly hub of the assemblage need not have a finish in accordance with Standard No. 107, but these items must comply with reflectance requirements when the assemblage is completed as a dune buggy.

In closing, I want to call your attention to section 110(e) of the Act and 49 CFR @ 551.45, which require that manufacturers of motor vehicles and equipment who offer their products for importation into the United States appoint a resident agent for service of process. I enclose a copy of @ 551.45 with the informational requirements underlined and request that you ask the Spanish manufacturer of the dune buggy chassis to file a designation of agent with us.

If you have any further questions I shall be happy to answer them for you.

Enclosures

ID: nht71-1.38

Open

DATE: 02/10/71

FROM: AUTHOR UNAVAILABLE; Lawrence R. Schneider; NHTSA

TO: Kelly Springfield Tire Company

TITLE: FMVSR INTERPRETATION

TEXT: This is in reply to your letter of February 2, 1971, concerning Part 574 - Tire Identification and Record Keeping regulations and to confirm that the date code may be placed at the end of the tire identification number by means of a screw as depicted in the sketch attached to your letter.

ID: nht71-1.39

Open

DATE: 02/18/71

FROM: AUTHOR UNAVAILABLE; Lawrence R. Schneider; NHTSA

TO: Toyo Tire (U.S.A.) Corporation

TITLE: FMVSR INTERPRETATION

TEXT: This is in reply to your letter of February 2, 1971, to Mr. Casanova concerning Part 574 - Tire Identification and Record Keeping.

Adding a group of numbers consisting of three-digits to the tire identification number is not permitted under the regulation because the additional numbers 99:(Illegible Word) be too easily confused with the tire identification number.

You are not prohibited, however, from placing the additional three-digit number elsewhere on the tire in an area where it would not be confused with the required tire identification number. Anywhere further than six inches would be far enough to avoid confusion.

ID: nht71-1.4

Open

DATE: 01/01/71 EST.

FROM: Robert L. Carter; NHTSA

TO: JEEP Corporation

TITLE: FMVSS INTERPRETATION

TEXT: On June 16, 1971, you and Mr. William Fleming of American Motors met with representatives of NHTSA and pointed out that the March 4, 1971, revisions of Standard No. 210 (36 F.R. 4291) had created a situation where seat belt anchorages for side-facing seats of multipurpose passenger vehicles would have to meet strength requirements only for the six-month period from July 1, 1971, to January 1, 1972. This occurred because the March 4 notice, which basically extended the existing standard for passenger cars to other types of vehicles as of July 1, 1972, did not have the exemption for side-facing seat belt anchorages that is contained in the revised standard that goes into effect on January 1, 1972.

The failure to exempt side-facing seats from the anchorage test requirements for the six-month period ending January 1, 1972, was inadvertent. A Federal Register notice will be issued shortly amending Standard No. 210 to correct this discrepancy. I am sending you this letter, which will be placed in the public files, in advance of the notice as an extraordinary procedure in light of the time period involved, to confirm that your vehicles need not meet the strength requirements for seat belt anchorages for side-facing seats apparently contained in Standard No. 210.

ID: nht71-1.40

Open

DATE: 05/21/71

FROM: Lawrence R. Schneider; NHTSA

TO: Jack Lewis; Legislative Assistant, U.S. Senate

TITLE: FMVSR INTERPRETATION

TEXT: This is in reply to your telephone conversation of May 19, 1971 with a member of this office concerning Pert 574 - Tire Identification and Record Keeping.

In your conversation you asked what the position of the National Highway Traffic Safety Administration would be if a retreader could establish he was unable to obtain, by May 22, 1971, the effective date of the regulation, the necessary tin plate for placing the required tire identification number on his retreaded tires.

Of course, each case would be considered individually, but if a retreader could demonstrate that good faith attempts had been made to obtain the tin plate by May 22, 1971, and due to circumstances beyond his control he was unable to mark tires manufactured after May 22, 1971 with the required identification number, the National Highway Traffic Safety Administration would not take enforcement section against the retreader.

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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