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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 13971 - 13980 of 16514
Interpretations Date
 search results table

ID: nht93-8.5

Open

DATE: November 10, 1993

FROM: J. Frank Haasbeek -- President, International Transquip Industries, Inc.

TO: Albert Gore, Jr. -- Office of the Vice President

TITLE: None

ATTACHMT: Attached to letter dated 12/23/93 from Howard M. Smolkin to J. Frank Haasbeek (A41; Std. 121)

TEXT:

In common with other entrepreneurs and business managers, I am delighted that you have made it your personal goal to reshape the way in which government goes about its business and thus lighten the bureaucratic load that inevitably each one of us has to carry.

My business has suffered enormously at the hands of the National Highway Traffic Safety Administration (NHTSA) and the gridlock in that division of the Department of Transportation is getting worse and not better.

Of necessity I will need to burden you with some background information that I will try to keep as brief and to the point as possible.

My company, a small business enterprise, manufactures air brake systems for trucks, buses, trailers etc. Our system is patented and its performance and built-in safety features are unequalled.

In April of 1992, the NHTSA issued an interpretation under a 1991 FMVSS 121 rule that instantly made our system incapable of compliance with that rule and hence illegal.

In a June 1992 meeting with NHTSA's Chief Counsel and over twenty of its department heads and staff, we proved conclusively that the NHTSA interpretation was in error and a rule making procedure was subsequently initiated by NHTSA to correct this anomaly.

The new draft rule was published in the Federal Register in March 1993, but as of this date the final rule has not been issued. I have been given to understand by the NHTSA that the agency's attorneys are too pre-occupied with congressionally mandated rule making to write the necessary legal language.

This company has been economically disadvantaged and damaged by the inordinate delay on the part of the NHTSA to correct its own bungling. We have had to reduce our staff and incurred substantial losses while a safer air brake system has been denied to many potential users.

The NHTSA is still without an administrator and the agency is foundering with no-one at the helm.

My employees, my investors and I would indeed be grateful if your office could assist in the issue of the final rule without any further delay.

- - - - - The following letter transmitted Mr. Haasbeek's correspondence to the NHTSA:

MEMORANDUM

DATE: DECEMBER 14, 1993 TO: Director, Office of Executive Secretariat U.S. DOT Room 10205 400 Seventh Street, S.W.

Washington, D.C. 20590

Enclosed are letters from constituents asking for assistance with matters related to the U.S. Department of Transportation. This information was sent to the office of Vice President Gore.

On behalf of the Vice President, I am forwarding this material with the request that the issues be addressed in an appropriate and expeditious manner. An acknowledgement of receipt and notification of this referral has been sent to each of the constituents. Please respond directly to the correspondents. No reply to this office is necessary.

Sincerely,

Bill Mason Director of Correspondence

ID: nht93-8.6

Open

DATE: November 10, 1993

FROM: Cheryl Graham -- District Manager, Northeast Region, ARI

TO: Chief Counsel's Office -- NHTSA

TITLE: None

ATTACHMT: Attached to letter dated 2/7/94 from John Womack to Cheryl Graham (A42; VSA Sec. 108(a))

TEXT:

I have spoken to several representatives of the Department of Transportation who were extremely helpful in providing me with information on brake light regulations, however, they suggested I write to you for a final determination on this subject.

Background: I work for a fleet leasing company and a client of mine, with a substantial fleet of cars across the country, wishes to install additional brake lights with the hopes of reducing rear-end collisions. The intent is to install an additional light at each side of the rear window. These lights would be the same color as the other brake lights and would illuminate simultaneously. The vehicle manufacturers do not offer this as an option and the work would be performed by an after-market installer, not yet determined.

When I initially investigated this request, I obtained copies of Federal Registers Volume 48, No. 202 and Volume 49, No. 97 as well as excerpts from the NHTSA Manual, Part 571.108. On page 236, S5.4(a) states that "No high-mounted stop lamp shall be combined with any other lamp or reflective device, other than with a cargo lamp." There were also several paragraphs referring to the positioning of high-mount stop lamps.

My interpretation was that additional stop lights were not permitted. However, subsequent conversations with the Office of Rulemaking for NHTSA have led me to believe that they are permitted. Therefore, my letter to you.

I would appreciate it if you could respond to me in writing as to whether my client can have the additional lights installed. Also, if the work is done improperly and results in an accident, where does the liability lie? As a leasing company, we are the registered owners of the vehicle but would have no direct control over the after-market installation. Insurance coverage is the responsibility of the lessee.

Your assistance in this matter is greatly appreciated. If you need to contact me by phone, please feel free to do so at 609-778-1500.

ID: nht93-8.7

Open

DATE: November 10, 1993

FROM: Steven R. Taylor -- S.R. Taylor Toys

TO: NHTSA

TITLE: None

ATTACHMT: Attached to letter dated 3/17/94 from John Womack to Steven R. Taylor (A42; Part 571)

TEXT:

This letter consists of information about the (ORIGINAL DESIGNER SEATBELT STRAPP). Its function is to serve as a reminder to buckle-up and to entertain a child with his/her favorite cartoon character, etc.

The ingriediants to the (SEATBELT STRAPP) consists of D.O.T. standard nylon seat belt webbing and a double sided tape adhesive. The face of the (SEATBELT STRAPP) has silk screened designs.

The (CHILD SEATBELT STRAPP) model is 15" in length and 1 1/2" in width. The double sided tape adhesive has a backing that peels off, so the adhesive is showing and can now be attached to the existing seat belt. (The adult size is 30" l x 2" w).

(Graphics omitted - see original)

The (ORIGINAL DESIGNER SEATBELT STRAPP) serves only as an entertainment piece and not as a safety device.

Who will buy the child (seatbelt strapp)? Our market target are: parents, grand parents, uncles and aunts.

Who will buy adult (SEATBELT STRAPP)? Hopefully everyone from teenagers to senior citizens.

ID: nht93-8.8

Open

DATE: November 11, 1993

FROM: Kathryn A. Roach -- Paralegal to Lloyd D. Levenson, Cooper Perskie April Niedelman Wagenheim & Levenson

TO: Chief Counsel -- NHTSA

TITLE: None $125 (OCC-9344)

ATTACHMT: Attached to letter dated 1/10/94 from John Womack to Kathryn A. Roach (A42; Std. 208), letter dated 1/19/90 from Stephen P. Wood to Linda L. Conrad (Std. 208), and letter dated 3/4/93 from John Womack to Robert A. Ernst

TEXT:

Please be advised that I spoke with the chief engineer at the National Highway Traffic Safety Administration who told me there is no regulation under the federal law which would require air bag replacement.

I would request that the above information be confirmed, in writing. The chief engineer provided me with your address, so that I could obtain the requested information.

Please do not hesitate to contact me should you have any questions concerning the above.

ID: nht93-8.9

Open

DATE: November 12, 1993

FROM: J. Z. Peepas -- Selecto-Flash, Inc.

TO: Taylor Vinson

TITLE: FAX#202-366-3820

ATTACHMT: Attached to letter dated 11/30/93 from John Womack to J. Z. Peepas (A41; Std. 108)

TEXT:

ATTACHED ARE 4 PRINTS, A-1, A-2, B-1, B-2 WHICH COVER THE FOLLING:

A-1 (40' CHASSIS) SHOWS 20' REFLECTIVE BEHIND THE GOOSE NECK FOR 40' CHASSIS WITH ONLY 6" PIECE WHITE REFLECTIVE MARKED ITEM 10, DELINEATING THE FRONT OF THE CHASSIS. THIS WILL LEAVE 8' CHASSIS UNMARKED AS DISCUSSED ON THE TELEPHONE.

A-2 (40' CHASSIS) WITH 20' REFLECTIVE FROM END OF GOOSE NECK BACK AND ADD ADDITIONAL REFLECTIVE FOR GOOSENECK.

B-1 (40/45' CHASSIS) SHOWS 50% OF THE REFLECTIVE FROM END OF GOOSE NECK TO END OF CHASSIS AND ONLY 6" PIECE WHITE REFLECTIVE AND DELINEATING FRONT OF CHASSIS.

B-2 (40/45' CHASSIS) WHICH ADDS ADDITIONAL REFLECTIVE ON GOOSE NECK EQUALLY SPACED.

WHEN I SPOKE ON THE TELEPHONE WITH YOU AND PAT BOYD, YOU INDICATED THAT AT LEAST 50% OF THE TOTAL LENGTH CHASSIS IN REFLECTIVE MATERIAL IS PLACED BEHIND THE GOOSE NECK. SINCE THE LOAD COVERS THE GOOSE NECK, YOU DID NOT SEE ANY NECESSITY IN PUTTING REFLECTIVE ON THE GOOSE NECK. HOWEVER, AT TIMES, A CHASSIS DOES MOVE WITHOUT A LOAD, AND THIS IN OUR OPINION, WILL CREATE A HAZARD, BECAUSE YOU WILL HAVE AN AREA OF 96" OR EVEN MORE DEPENDING ON DESIGN, WHICH WILL NOT HAVE ANY REFLECTIVE SHEETING ON IT.

IT WOULD BE OUR SUGGESTION THAT YOU RE-EVALUATE YOUR POSITION FOR NOT MAKING IT MANDATORY THAT REFLECTIVE SHOULD BE APPLIED ON THE GOOSE NECK.

I DISAGREE WITH THIS- 50% OF OVERALL LENGTH EVENLY SPACED FROM FRONT TO REAR (INCLUDING GOOSENECK) WITH A TOTAL OF 24'4" FOR A 48 FT. CHASSIS.

CHASSIS DO TRAVEL WITHOUT CONTAINERS AND WOULD THEN CREATE A SAFETY HAZARD WHEN:

1) ON THE HIGHWAY BY HAVING AN 8 TO 10 FOOT GOOSENECK NOT IDENTIFIED CREATING A SPACE THAT COULD BE CONFUSING TO A MOTORIST.

2) IN THE CONTAINER YARDS WHEN CHASSIS ARE OFF LOADED. SEVERAL INCIDENTS HAVE BEEN REPORTED WHERE A PANEL TRUCK WILL RIDE UNDER THE NOSE OF CHASSIS DRIVING IT THROUGH THE WINDSHIELD.

FINALLY WE UNDERSTAND THAT PAT BOYD HAS ADDRESSED THE ISSUE THAT NO MORE THAN FOUR FEET OF UNIDENTIFIED AREA SHALL BE ALLOWED ON A CHASSIS. OBVIOUSLY THE 8 to 10 FEET OF GOOSENECK WOULD BE IN VIOLATION OF THAT STATEMENT, FOR CHASSIS OFFLOADED ON A HIGHWAY.

ID: nht93-9.1

Open

DATE: December 2, 1993

FROM: Harry C. Gough, P.E. -- Automotive Engineering Professional Specialist, State of Connecticut, Department of Motor Vehicles

TO: Chief Counsel, NHTSA

TITLE: None

ATTACHMT: Attached to letter dated 3/29/94 from John Womack to Harry C. Gough (A42; Std. 108)

TEXT:

I am writing on behalf of the State of Connecticut Department of Motor Vehicles. We are requesting a written opinion or interpretation regarding the meaning of the terms "flash alternately" or "alternately flashing" as they apply to school bus overhead signal lamps required under FMVSS #108. The terms are used in SAE Standard J887, which is incorporated by reference. The reason for the request is that a manufacturer of strobe (gaseous-discharge) lamps has supplied test documentation indicating that a system they offer complies with the mechanical, color, and intensity provisions of SAE J887 and thus comply with FMVSS #108. The system offered uses what is referred to as a quad-pulse strobe flash pattern. Effectively the lamp on one side flashes on and off four times in a 255 millisecond period and then stays off for 745 milliseconds, then the lamp on the opposite side of the bus repeats the aforementioned pattern. While the pattern is repeated alternately from side to side a question arises as to whether "alternately flashing" refers to the pattern heretofore described or do the four distinct on/off cycles on each side of the school bus defeat the intent of the term alternating.

While I realize your office is very busy with such interpretations, I would appreciate a response at your earliest convenience. If there are any additional questions or information required, please feel free to have your office call me at (203) 566-3754.

Thank you in advance for your attention to this matter.

ID: nht93-9.10

Open

DATE: December 10, 1993

FROM: Joe Miller -- Product Support Manager, Load King

TO: John Womack -- Acting Chief Council, NHTSA

TITLE: None

TEXT:

Load King manufactures trailers in Elk Point, South Dakota. We sell our trailers to a dealer in Minneapolis, Minnesota who in turn sells these trailers to customer/users. The dealer does not use these trailers other than to set them in their yard for resale.

We want this dealer to do some finish manufacturing for us. One item specifically is to paint the trailers, install operational decals and place the conspicuity striping. Can primed trailers be moved without conspicuity striping in this case?

Thank you in advance for your reply.

ID: nht93-9.11

Open

DATE: December 13, 1993

FROM: Lawrence P. White -- Acting Director, Bureau of Motor Vehicles, Commonwealth of Pennsylvania, Dept. of Transportation

TO: Mary Versie -- NHTSA, School Bus Regulations

TITLE: None

ATTACHMT: Attached to letter dated 3/21/94 from John Womack to Lawrence P. White (A42; Redbook; Std. 217)

TEXT:

I am writing concerning the new school bus emergency exit requirements in the FMVSS 217.

My office has received numerous inquiries from Pennsylvania's law enforcement agencies, school bus sales representatives and school bus contractors, concerning the new school bus exit requirements. These questions are:

1. The effective date - is it the chassis manufacturer's date of completion, the final stage manufacturer's date of completion, or somewhere in between?

2. Based on the formula for emergency exit space, is the area of the front entrance door to be included? Does this mean on a vehicle of 60 to 77 passengers, the only additional requirements beyond the front and rear doors is a left side exit door?

3. The "clear aisle space" required for exit to the proposed side emergency door, according to federal specifications, can be met with a flip- up type seat or a clear opening of 12", as measured from the back of the door forward. Are there any specifications, definitions, or descriptions provided as to what would be considered a "flip seat"?

4. Also, there is concern regarding school buses that are equipped with the "flip seat" by the emergency door opening and the possibility of school children, either intentionally or accidentally, unlatching the door latch mechanism. Are the door latch mechanisms to be equipped to help prevent this from occurring?

In the interest of maintaining the integrity of school buses, I am inquiring as to the correct responses to these questions and concerns.

Thank you for your assistance on this matter.

ID: nht93-9.12

Open

DATE: December 14, 1993

FROM: J. Hulshof -- NEDAP N.V.

TO: Patrick Boyd -- Office for Rulemaking, NHTSA

TITLE: Standard FMVSS 118

ATTACHMT: Attached to letter dated 4/12/94 from John Womack to J. Hulshof (A42; Std. 118)

TEXT:

Referring to our recent telecons we wish to inform you about the following.

We have designed a SCU (Sunroof Control Unit) for a power operated roof panel system where the roof panel can be closed only in the following circumstances:

1. Ignition key activated AND continuous activation of close button 2. Ignition key activated AND short touch of close button (one shot close, close button is released and roof panel moves to closed position) 3. Continuous operation of Central close mechanism, not capable closing the roof panel from a distance of more than 6 meters from the vehicle. 4. Ignition key activated AND continuous operation of a PANIC button

Note: System has no reversal mechanism acc. to the FMVSS 118

Referring to the above mentioned: Does the sunroof comply with the rules as stated in FMVSS 118?

Are there any amendments to the FMVSS 188 in progress?

We look forward to your answer.

Note: For any reactions, our fax nr. in the USA: 815 633 6089 Attn. Bob Cooper, LMS

ID: nht93-9.13

Open

DATE: December 14, 1993

FROM: Michael S. Marczynski -- Sales Representative, Anita's Auto World

TO: Office Of The Chief Council -- NHTSA

TITLE: NONE

ATTACHMT: Attached To Letter Dated 6/3/94 From John Womack To Michael S. Marczynski (A42; Std. 108; 205; 208; 216; 302; VSA 109(A)(2)(A))

TEXT: Dear Chief Council,

This letter is in regards to a telephone conversation on 12-14-93 with a Mr. Entwhistle of your Washington office. The topic of the conversation was about obtaining a formal written notice from you concerning the legal installation of roll pans, and convertible tops on light-duty pick-up trucks. Some of our customers have expressed concern over the legal aspects of having these items installed in their vehicles. If at all possible, could you please address this issue in letter form for us. We are a professional body/paint shop located in Lansing, Michigan, and would like to perform this after-market installation as a service to our customers. I feel a written letter would carry more validity for us.

Thank-you for your time. If you have any questions please feel free to contact me at (517) 487-2220.

Sincerely,

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.