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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 12951 - 12960 of 16490
Interpretations Date

ID: 77-1.44

Open

TYPE: INTERPRETATION-NHTSA

DATE: 03/10/77

FROM: AUTHOR UNAVAILABLE; E. T. Driver; NHTSA

TO: Stanley Electric Co., Ltd.

TITLE: FMVSS INTERPRETATION

TEXT: This is in reply to your letter of February 14, 1977, concerning the symbol "DOT" as a certification of compliance to FMVSS No. 108.

The symbol "DOT" is permitted by the Standard to be placed on the item of equipment in lieu of the certification requirements of Section 114 of the "National Traffic and Motor Vehicle Safety Act of 1966," which states, in part ". . . In the case of an item of motor vehicle equipment such certification may be in the form of a label or tag on such item or on the outside of a container in which such item is delivered . . ."

"DOT" on the individual container does not meet the certification requirements. The label or tag must state that the item "conforms to all applicable Federal motor vehicle safety standards."

Sincerely,

ATTACH.

STANLEY ELECTRONIC CO. LTD.

February 14, 1977

E. T. Driver -- Director, Office of Crash Avoidance Motor, Vehicle Programs,

U. S. Department of Transportation, National Highway Traffic Safety Administration

Dear Mr. Driver,

Our lighting equipment to which F.M.V.S.S. 108 is applicable are now being directly labeled with symbol "DOT" as a certification of compliance to that standard.

We are now considering to label this symbol "DOT" on an individual container in which each item of equipment is packaged, instead of labelling it on the item itself.

Please let us have your comment on whether the labelling with symbol "DOT" container is acceptable or not.

Thanking you in advance for your cooperation,

Yours faithfully, H. Miyazawa -- Director, Automotive Lighting, Engineering Dept.

ID: nht95-6.51

Open

TYPE: INTERPRETATION-NHTSA

DATE: September 20, 1995

FROM: Jonathan P. Reynolds -- Executive Vice President, General Counsel, Cosco

TO: Deirdre Fujita -- NHTSA

TITLE: Cosco's Petition for Reconsideration Final Rule - Federal Register Volume 60 Number 129 Docket No. 74-09; Notice 42

ATTACHMT: ATTACHED TO 10/24/95 LETTER FROM JOHN WOMACK TO JONATHAN P. REYNOLDS (REDBOOK 4; PART 553; 74-09, N42-005-02)

TEXT: Dear Ms. Fujita:

In accordance with the requirements set forth in the Federal Register announcement of the subject Final Rule, Cosco submitted its petition for reconsideration in a timely fashion. The petition was transmitted via Federal Express on Friday, August 4, 1995, for next day delivery, on Monday, August 7, 1995.

Although we have not been formally advised, we have learned informally that NHTSA may contend that the petition was not received until August 10. We have confirmed with Federal Express that in fact the petition was delivered on August 7, 1995, and signed for by NHTSA employee T. Proctor. Attached are the Federal Express forms signed by each recipient of a Federal Express delivery, showing T. Proctor under item 15 on page 2 for August 7, 1995. Federal Express has confirmed that this package was in fact delivered to NHTSA on August 7, 1995.

Please confirm in writing that Cosco's petition is being deemed as timely received and that a response to the petition will be forthcoming in a timely fashion. Given the scope of the Final Rule and the very important concerns involved, Cosco assumes that the agency wishes to promptly address the issues raised by Cosco in its petition.

Please contact me if you require any further information or have any questions. I look forward to your prompt reply to this inquire.

(Federal Express forms omitted.)

ID: nht95-4.29

Open

TYPE: INTERPRETATION-NHTSA

DATE: September 20, 1995

FROM: Jonathan P. Reynolds -- Executive Vice President, General Counsel, Cosco

TO: Deirdre Fujita -- NHTSA

TITLE: Cosco's Petition for Reconsideration Final Rule - Federal Register Volume 60 Number 129 Docket No. 74-09; Notice 42

ATTACHMT: ATTACHED TO 10/24/95 LETTER FROM JOHN WOMACK TO JONATHAN P. REYNOLDS (REDBOOK 4; PART 553; 74-09, N42-005-02)

TEXT: Dear Ms. Fujita:

In accordance with the requirements set forth in the Federal Register announcement of the subject Final Rule, Cosco submitted its petition for reconsideration in a timely fashion. The petition was transmitted via Federal Express on Friday, August 4, 199 5, for next day delivery, on Monday, August 7, 1995.

Although we have not been formally advised, we have learned informally that NHTSA may contend that the petition was not received until August 10. We have confirmed with Federal Express that in fact the petition was delivered on August 7, 1995, and signe d for by NHTSA employee T. Proctor. Attached are the Federal Express forms signed by each recipient of a Federal Express delivery, showing T. Proctor under item 15 on page 2 for August 7, 1995. Federal Express has confirmed that this package was in fac t delivered to NHTSA on August 7, 1995.

Please confirm in writing that Cosco's petition is being deemed as timely received and that a response to the petition will be forthcoming in a timely fashion. Given the scope of the Final Rule and the very important concerns involved, Cosco assumes tha t the agency wishes to promptly address the issues raised by Cosco in its petition.

Please contact me if you require any further information or have any questions. I look forward to your prompt reply to this inquire.

(Federal Express forms omitted.)

ID: GPScrashsensor

Open



    Mr. Ralph Longton
    Application Engineer
    LoJack Corp.
    15 Commercial Circle
    Dedham, MA 02026



    Dear Mr. Longton:

    This responds to your letter of June 1, 2001. In that letter, you inquire about a system that LoJack is currently developing. This system will be located in the passenger compartment of a vehicle. In the event the vehicle is in a crash, the system will rate the crash as minor or major, alert a G.P.S. locator, and contact a clearinghouse. The clearinghouse will attempt to contact the driver or send assistance. You would like to know whether there are any regulatory obligations you may need to meet in the deployment and operation of such a device.

    The National Highway Traffic Safety Administration (NHTSA) cannot speak to all of your regulatory obligations, but only to Federal requirements in the area of automotive safety. We do not have any Federal motor vehicle safety standards (FMVSS) for this type of device. However, the FMVSS could be relevant to your device if the device affects a vehicle's compliance with any of the standards. We do not have sufficient information about your system to comment on whether it would likely affect a vehicle's compliance with the FMVSS.

    I have enclosed a copy of a paper titled "Information for New Manufacturers of Motor Vehicles and Motor Vehicle Equipment" which identifies relevant Federal statutes and NHTSA standards and regulations affecting motor vehicle and motor vehicle equipment manufacturers.

    I hope this answers your question. Should you have any more questions, please contact Edward Glancy of my staff at (202) 366-2992.

    Sincerely,

    John Womack
    Acting Chief Counsel

    Enclosure
    Ref:571
    d.7/20/01



2001

ID: 3271yy

Open

Mr. John H. Heinrich
District Director of Customs
U.S. Customs Service
300 So. Ferry Street
Terminal Island, CA 90731

Re: Case No. 92-2704-00015

Dear Mr. Heinrich:

This responds to your letter of December 5, 1991, enclosing a petition for relief from the forfeiture of "200 Spinner Wheel Nuts" seized by the Customs Service as violative of 49 CFR Sec. 571.211. The petitioner expresses the opinion that the wheel nuts should be exempt from DOT regulations, stressing safety considerations and the need to replace worn parts on vehicles manufactured in the l950's. You have also enclosed a copy of the petitioner's own parts list that identifies the wheel nuts as part of a conversion kit, intended to replace disc wheels with wire wheels.

Federal Motor Vehicle Safety Standard No. 211, Wheel Nuts, Wheel Discs, and Hub Caps, 49 CFR 571.211, precludes, for use on passenger cars, wheel nuts that incorporate winged projections. The chrome wheel nuts depicted in the Moss Motors catalogue page which you enclosed (Parts Nos. 200-210 and 200-220) clearly incorporate winged projections, and are the type of wheel nuts that Standard No. 211 addresses and prohibits. As such, they may not be imported for sale in the United States.

We have discounted petitioner's safety arguments. This is the first allegation in the nearly 24 years that the standard has been in effect that the spinners are required to replace original equipment, implying that there is no acceptable substitute that would conform with Standard No. 211. In our view, no justification has been shown for granting the petition.

Sincerely,

Paul Jackson Rice Chief Counsel

/ref:2ll d:l/9/92

1970

ID: nht92-9.55

Open

DATE: January 9, 1992

FROM: Paul Jackson Rice -- Chief Counsel, NHTSA

TO: John H. Heinrich -- District Director of Customs, U.S. Customs Service

TITLE: Case No. 92-2704-00015

ATTACHMT: Attached to letter dated 12/05/91 from John H. Heinrich and Kathleen M. Tobin to the Office of Chief Counsel, DOT (OCC 6758)

TEXT:

This responds to your letter of December 5, 1991, enclosing a petition for relief from the forfeiture of "200 Spinner Wheel Nuts" seized by the Customs Service as violative of 49 CFR Sec. 571.211. The petitioner expresses the opinion that the wheel nuts should be exempt from DOT regulations, stressing safety considerations and the need to replace worn parts on vehicles manufactured in the 1950's. You have also enclosed a copy of the petitioner's own parts list that identifies the wheel nuts as part of a conversion kit, intended to replace disc wheels with wire wheels.

Federal Motor Vehicle Safety Standard No. 211, Wheel Nuts, Wheel Discs, and Hub Caps, 49 CFR 571.211, precludes, for use on passenger cars, wheel nuts that incorporate winged projections. The chrome wheel nuts depicted in the Moss Motors catalogue page which you enclosed (Parts Nos. 200-210 and 200-220) clearly incorporate winged projections, and are the type of wheel nuts that Standard No. 211 addresses and prohibits. As such, they may not be imported for sale in the United States.

We have discounted petitioner's safety arguments. This is the first allegation in the nearly 24 years that the standard has been in effect that the spinners are required to replace original equipment, implying that there is no acceptable substitute that would conform with Standard No. 211. In our view, no justification has been shown for granting the petition.

ID: nht73-1.37

Open

DATE: 11/19/73

FROM: AUTHOR UNAVAILABLE; Richard B. Dyson; NHTSA

TO: Crane Carrier Company

TITLE: FMVSS INTERPRETATION

TEXT: This is in reply to your letter of November 7, 1973, to Mr. Schneider asking whether Standard No. 108 permits four identification lamps.

It does not. The purpose of the three-lamp system is that vehicles 80 inches or more in overall width be clearly identified as large vehicles, and only the three-lamp system specified by the standard is permissible. Standard No. 108, however, allows some latitude in mounting. The system need not be mounted on the vertical centerline of the vehicle if the manufacturer determines that is impracticable. Since you appear to have made such a determination, the front identification lamp system should be placed "as close as practicable to the vertical centerline" with height and spacing requirements in accordance with Standard No. 108.

Yours truly,

NHTSA Office of Chief Counsel

Attention: Larry Schnieder

Dear Sir:

In regards to trucks of 80 or more inches, are the three (3) lamps for front identification a minimum requirement?

The front loader equipment requires a bumper guard across the center of the windshield over the cab which would obscure the center lamp. Would four (4) identification lamps be permissible, i.e., 2 on each side of the center?

I would appreciate any advice or reference to a standard.

Thanking you in advance.

Very truly yours,

Crane Carrier Company --

Darrell Gambill,

Standards Engineer

ID: nht71-1.17

Open

DATE: 09/20/71

FROM: AUTHOR UNAVAILABLE; Lawrence R. Schneider; NHTSA

TO: Phillips Petroleum Company

TITLE: FMVSS INTERPRETATION

TEXT: This is in reply to a request made on behalf of Phillips Petroleum Company by Veigh J. Nielson for an assigned identification mark for two of Phillips' plants which manufacture tires for research purposes.

As I informed you in my letter of September 20, 1971, if Phillips purchases a new tire, removes the trend material and then applies its own experimental trend containing various rubber compounds, Phillips is considered to be a new tire manufacturer. If Phillips applies its experimental tread to a used tire, it is considered a retreader of tires.

As a new tire manufacturer you are required to certify the tire as conforming to the new passenger car tire standard (No. 109) and comply with Part 574 - Tire Identification and Record Keeping (49 CFR 574). Accordingly, you are assigned the identification mark of "J1" for tires made in your (Illegible Word), Oklahoma plant and "K1" for tires manufactured in your Stow, Ohio plant.

If you act as a retreader then Part 574 would not be applicable for the tires you retread because they are retreaded for your own use. (Enclosed is a copy of Docket No. 70-12, Notice No. 8 which makes the regulation inapplicable to retreaders who retread for their own use). As explained in my letter of September 20, you are, of course, required to certify that your new tires and your retreaded tires comply with the respective standards for new and retreaded tires if they are to be used on the public highways, by placing the symbol DOT on the tires in the prescribed location.

ID: nht71-5.22

Open

DATE: 12/14/71

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

TO: Phillips Petroleum Company

TITLE: FMVSS INTERPRETATION

TEXT: This is in reply to a request made on behalf of Phillips Petroleum Company by Veigh J. Nielson for an assigned identification mark for two of Phillips' plants which manufacture tires for research purposes.

As I informed you in my letter of September 20, 1971, if Phillips purchases a new tire, removes the tread material and then applies its own experimental trend containing various rubber compounds, Phillips is considered to be a new tire manufacturer. If Phillips applies its experimental tread to a used tire, it is considered a retreader of tires.

As a new tire manufacturer you are required to certify the tire as conforming to the new passenger car tire standard (No. 109) and comply with Part 574 - Tire Identification and Record Keeping (49 CFR 574). Accordingly, you are assigned the identification mark of "J1" for tires made in your Bartlesville, Oklahoma plant and "K1" for tires manufactured in your Stow, Ohio plant.

If you act as a retreader then Part 574 would not be applicable for the tires you retread because they are retreaded for your own use. (Enclosed is a copy of Docket No. 70-12, Notice No. 8 which makes the regulation inapplicable to retreaders who retread for their own use). As explained in my letter of September 20, you are, of course, required to certify that your new tires and your retreaded tires comply with the respective standards for new and retreaded tires if they are to be used on the public highways, by placing the symbol DOT on the tires in the prescribed location.

ENC.

ID: nht91-2.4

Open

DATE: February 27, 1991

FROM: Charles A. Schue, Jr.

TO: Director, Office of Vehicle Safety Compliance, DOT/NHTSA

TITLE: None

ATTACHMT: Attached to letter dated 3-25-91 from Paul Jackson Rice to Charles A. Schue, Jr. (VSA Sec. 108; Regs. 591)

TEXT:

Reference is made to your Guide for Complying With Regulations On Imported Motor Vehicles, DOT HS 807 144, Effective January 31, 1990.

I just received this guide from your office and was previously unaware of the one provision regarding purchase of the vehicle prior to November 1, 1988.

I have been working in Turkey continuously sine June, 1986. This employment has been with two separate United States Companies who are contracted to the U.S. Air Force on the Turkey Base Maintenance Contract.

In addition, I retired from the U.S. Army as a Warrant Officer Grade Three in 1974 after 27 years honorable service. I have not imported any other non-conforming vehicle in the past.

I purchased my present foreign made automobile on 15 May 1969 from an American employee of my present company who had previously purchased it from another American employee of the same company many years before.

Statistics of this automobile are:

1979, Mercedes, 300D, 423 Four Door, Red, SN: 42313010127393.

Request waiver of purchase date requirement outlined in your referenced guide. I plan to import this vehicle prior to October 31, 1992.

In the event this waiver cannot be granted, please inform me of other provisions under which I may request approval to import this vehicle into the U.S.A.

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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