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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 15051 - 15060 of 16517
Interpretations Date

ID: nht71-3.21

Open

DATE: 06/24/71

FROM: AUTHOR UNAVAILABLE; Lawrence R. Schneider; NHTSA

TO: 707 Tire Service Inc.

TITLE: FMVSR INTERPRETATION

TEXT: This is in reply to your letter of June 15, 1971, concerning the Tire Identification and Record Keeping Regulation (49 CFR Part 574).

As stated in the interpretation published in the Federal Register of May 28, 1971, under section 113(f) of the National Traffic and Motor Vehicle Safety Act, "it is the tire manufacturer who has ultimate responsibility for maintaining the records of first purchasers".

Under the Act and the Regulation, we have no authority to require a tire manufacturer to choose someone as his designee. I have asked Goodyear's counsel for their position with regard to the possible use of tire dealers customer's lists and was forwarded a letter dated June 8, 1971, from the Goodyear Tire and Rubber Company which sets forth the company's policy with regard to the prohibition in the regulation. I enclose the letter for your information.

ENCLOSURE

ID: nht71-3.22

Open

DATE: 06/30/71

FROM: AUTHOR UNAVAILABLE; Lawrence R. Schneider; NHTSA

TO: Fiat Motor Company, Inc.

TITLE: FMVSS INTERPRETATION

TEXT: Thank you for your letter of February 19, 1971, in which you request an interpretation of the applicability of Federal Motor Vehicle Safety Standard No. 206 to the right side door of the Fiat City Taxi Car. I apologize for the delay in responding to your letter.

Your questions and their answers are set forth below. Questions 1 and 2 have been reversed to facilitate discussion.

"Can this door be classified as a sliding door?" Yes, if, as it appears, the mechanism attaching the right side door to the vehicle is a sliding device rather than a hinge system.

"Can the outside door handle release control be inoperative and the door opened only from the inside." Yes, since the right side door is a sliding door, rather than a hinged door, it is not subject to the door lock requirements specified in S4.1.3 of the Standard.

"Which are the loads, the direction and location of the load, and the test procedures to be followed to demonstrate that this door conforms to the Standard 206." The performance requirements and demonstration procedures which apply to sliding doors are specified in S4.3 and S5.3, respectively. S4.3 requires that the track and slide combination or other supporting means for the right side door not separate when a total transverse load of 4,000 pounds is applied, with the door in the closed position. Compliance of the right side door with S4.3 is required by S5.3 to be tested by applying an outward transverse load of 2,000 pounds to the load bearing members at the opposite edges of the door. The total force applied would be 4,000 pounds. S5.3 requires that the testing be done either in the vehicle or with the door retention components in a bench test fixture.

"Can this door have only a fully latched position?" Yes. Standard No. 206 does not specify any requirements for latches on sliding doors.

Please write if I can be of any further assistance.

ID: nht71-3.23

Open

DATE: 06/30/71

FROM: AUTHOR UNAVAILABLE; Lawrence R. Schneider; NHTSA

TO: Trailer Coach Association

TITLE: FMVSS INTERPRETATION

TEXT: This is in reply to your letter of June 7, 1971, requesting an interpretation of the applicability of the Tire Identification and Record Keeping Regulation to the mobile home and recreational vehicle industry.

You have asked if there is a specific regulation requiring the motor vehicle dealer to report tire data to the motor vehicle manufacturer when the vehicle is sold equipped with new tires installed by the manufacturer. There is no requirement that the vehicle dealer report tire data to the vehicle manufacturer, however, in the event the vehicle is sold with tires different from those shipped on or in the vehicle by the vehicle manufacturer, the vehicle dealer would have to report the name and address of the purchaser along with the tire identification number to the tire manufacturer.

You have asked if the Administrator would apply section 113(f) of the Act to require vehicle dealers to provide tire data to the vehicle manufacturer when the vehicle is sold equipped with tires installed by the vehicle manufacturer. The vehicle manufacturer is required to keep records of tires shipped on or in his vehicles as well as the name and address of the first purchaser. It is doubtful that any additional requirements will be considered unless this system appears to be ineffective.

Regarding your question whether there is a regulation requiring the vehicle manufacturer to report tire data to the tire manufacturer, there is no requirement that vehicle manufacturer report tire information to the tire manufacturer because the responsibility for issuing defect notification to the first purchaser of the vehicle rests with the vehicle manufacturer and not with the tire manufacturer.

You have also asked, in a situation where a vehicle dealer refuses to provide "tire records" to the vehicle manufacturer, would this constitute a "due care" defense for the vehicle manufacturer who would be unable to maintain the records required by the regulation. Because each enforcement action is handled separately, it is impossible to determine in advance whether this would be considered a "due care" defense in the situation you describe, however, it would be taken into consideration before an enforcement action would be initiated. If vehicle dealers refuse to cooperate and provide first purchaser information which section 113(f) of the Act requires vehicle manufacturers to maintain, the Administration would consider issuing a regulation making this mandatory.

If we can be of any further assistance, please feel free to write.

ID: nht71-3.24

Open

DATE: 07/02/71

FROM: E.T. DRIVER -- NHTSA; SIGNATURE BY JOHN CARSON

TO: Bandag Incorporated

TITLE: FMVSR INTERPRETATION

TEXT: This is in reply to your letter of May 30, 1971, and to confirm opinions given by members of this office(Illegible Words) phone coversation with you.

Under the National Traffic and Motor Vehicle Safety Act and regulations issued pursuant to it the treadless casing you import is not considered to be a completed tire until the tread is applied. Therefore, the Bandag dealer applying the tread is considered to be the tire manufacturer and the Korean manufacturer of the casing does not have to put his own "DOT" number on the casing.

Since you expect many of your dealers will be using this process, in order not to unduly expand the new manufacturer's list, all your dealers are to use your assigned code number "DOT" for the grouping representing the manufacturer's assigned code and their own three symbol retreader's code in the third grouping which is normally considered the optional code:

Your dealers, as manufacturers of the tires are responsible for maintaining the records of the first purchaser of the tires they manufacturer.

I believe Docket No. 70-12, Notice No. 9 (36 P.R. 9869) answers your question concerning the location of tire identification numbers.

Mr. M. Groosman U.S. Factory Representative Automobiles Peugeot

This is in reply to your letter of June 22 requesting an interpretation of Paragraph S4.2 of Motor Vehicles Safety Standard No. 101.

You may mark your windshield wiper control, and lighting - windshield washing control in the manner indicated in your letter. We do not consider the washing control a wiping control requiring identification as such merely because the wiper is momentarily activated when the washer system is in operation.

Lawrence R. Schneider Acting Chief Counsel

ID: nht71-3.25

Open

DATE: 07/07/71

FROM: AUTHOR UNAVAILABLE; Lawrence R. Schneider; NHTSA

TO: Chase Manhattan Capital Corporation

TITLE: FMVSR INTERPRETATION

TEXT: This is in reply to your letter of June 21, 1971 concerning the Tire Identification and Record Keeping regulation (49 CFR Part 574). We are concerned with the points you raise in your letter regarding the confidentiality of tire dealers customer's lists and the extra burden the regulation causes dealers who handle more than one brand of tires.

However, under the National Traffic and Motor Vehicle Safety Act we do not feel we have authority to require the tire manufacturer to choose someone as his designee. Section 113(f) of the Act makes the tire manufacturer responsible for maintaining the records of first purchasers.

As you probably know, any use of the customer's list by the tire manufacturer is expressly prohibited by the regulation. Any violation of this prohibition will be enforced.

I have enclosed for your information a copy of a notice published in the Federal Register May 28, 1971 which is relevant to the points you raise.

ID: nht71-3.26

Open

DATE: 07/08/71

FROM: AUTHOR UNAVAILABLE; Lawrence R. Schneider; NHTSA

TO: Gator Trailers Corporation

TITLE: FMVSR INTERPRETATION

TEXT: This is in reply to your correspondence of June 3, 1971, requesting information on how you can receive copies of agency proposed and final regulations, and requesting clarification of certain provisions of an amendment to the Certification regulations (49 CFR Part 567) that was published April 14, 1971.

With reference to your request to receive copies of agency rulemaking publications, we are in the process of establishing a procedure whereby members of the public will be able to receive copies of such publications on a continuing basis for a nominal charge. Until this procedure is implemented, however, upon return of the enclosed mailing list questionnaire your name will be placed on a mailing list to receive copies of relevant materials.

With reference to the amendment to the Certification regulations, you ask whether section 567.4(g)(1)(iii)(3) requires all options to be shown with their respective gross vehicle weight ratings, pointing out that various tire size options are available with your vehicles, each of which may change the GVWR. You also ask whether the requirements of section 567.4(f)(1)(iii)(4), "Gross Axle Weight Rating", apply to trailers.

The gross vehicle weight rating is a value specified by the manufacturer. While the manufacturer may list for it the precise weight of a fully loaded vehicle, considering all options, he is free to set the weight more arbitrarily if he so chooses. The manufacturer should establish the weight rating, however, with the understanding that his vehicle will be loaded to it in determining compliance with certain motor vehicle safety standards.

With reference to your second question, the gross axle weight rating is applicable to trailers. Many trailers are designed so that only a portion of the vehicle's weight is carried on the axle, with the remainder carried by the towing vehicle. In such cases the gross axle weight rating will be different from the gross vehicle weight rating.

Please write if you have further questions.

ID: nht71-3.27

Open

DATE: 07/08/71

FROM: AUTHOR UNAVAILABLE; Lawrence R. Schneider; NHTSA

TO: Nathan Sagan

TITLE: FMVSR INTERPRETATION

TEXT: This is in further reply to your request made to the Regional Administrator of the National Highway Traffic Safety Administration concerning the applicability of the Tire Identification and Record Keeping regulation (49 CFR Part 57) to tires on Cushman Golf Carts.

As we indicated in our letter of June 23, golf carts are not considered to be motor vehicles within the meaning of the regulation or the National Traffic and Motor Vehicle Safety Act. Therefore, the regulation is not applicable to tires sold with or for golf carts.

ID: nht71-3.28

Open

DATE: 07/10/71

FROM: CLUE D. FERGUSON -- NHTSA; SIGNATURE BY JOSEPH F. ZEMAITIS

TO: Superex of Ramsey Ltd.

TITLE: FMVSS INTERPRETATION

TEXT: This is in reply to your letter of June 10, 1971, in which you state that you are interested in determining whether a particular child seat meets Federal requirements, and whether you may submit a sample fo us for approval.

The NHTSA does not furnish approvals, or statements that a particular product complies with an applicable Federal standard. Under the National Traffic and Motor Vehicle Safety Act (15 U.S.C. @ 1381 at seg.) it is the responsibility of each manufacturer both to determine that his products comply with any applicable safety standard, and to certify that the product complies in accordance with section 114 of the Act (15 U.S.C 1403) and the Certification regulations (49 CFR Part 567, copy enclosed).

Manufacturers generally either test their products to the applicable standards in their own facilities, or contract with an independent test laboratory to perform the appropriate tests. It is up to the manufacturer to determine what means are best suited for his particular product. You should note, however, that the National Traffic and Motor Vehicle Safety Act requires a manufacturer to use due care both in manufacturing his products to comply with applicable standards, and ensuring that his certification that they comply is not false or misleading (Section 108). Violators of those requirements may be subject to civil penalties and other sanctions provided for in the Act (Sections 109 and 110).

A copy of the Act, with the sections specified above marked for your convenience, is enclosed. If you have any questions concerning its application to you, please write to us and we will be happy to answer them for you.

Enclosure

ID: nht71-3.29

Open

DATE: 07/13/71

FROM: AUTHOR UNAVAILABLE; Lawrence R. Schneider; NHTSA

TO: Volkswagen of America, Inc.

TITLE: FMVSS INTERPRETATION

TEXT: This is in response to your petition for rulemaking of June 28, 1971. You requested that Standard No. 208 be amended to allow the seat belt warning switch to be installed in the buckle instead of the retractor.

The action on petitions for reconsideration issued on July 2, 1971, in effect granted your request, allowing the warning shut-off to be keyed to webbing withdrawal or buckle closure.

ID: nht71-3.3

Open

DATE: 05/17/71

FROM: AUTHOR UNAVAILABLE; L. B. Schneider; NHTSA

TO: Toyota Motor Company, Ltd.

TITLE: FMVSS INTERPRETATION

TEXT: This is in reply to your letter of April 1 seeking a clarification of paragraph S4.1.2 of Motor Vehicle Safety Standard No. 104.

We confirm your understanding that S4.1.2 excludes any part of wiped areas A, B, and C that lie outside the perimeter line. Change of your driver's seating reference point to meet the proposed requirements of Standard No. 201 does not affect the percentage of area A, assuming no change in the perimeter line.

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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