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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 6761 - 6770 of 16514
Interpretations Date
 search results table

ID: nht92-7.13

Open

DATE: May 6, 1992

FROM: Paul Jackson Rice -- Chief Counsel, NHTSA

TO: L. Louis Raring -- Raring & Lipoff

TITLE: None

ATTACHMT: Attached to letter dated 2/25/92 from L. Louis Raring to Jack Rice (OCC 7065)

TEXT:

This responds to your request for information on Federal Motor Vehicle Safety Standard No. 218, Motorcycle Helmets (49 CFR S571.218). Specifically, you were interested in whether this agency "approves" motorcycle helmets pursuant to Standard No. 218. I am pleased to have this chance to explain our laws and regulations for you.

The National Traffic and Motor Vehicle Safety Act (15 U.S.C. 1381 et seq.; Safety Act) authorizes this agency to issue safety standards applicable to new motor vehicles and items of motor vehicle equipment. We have exercised this authority to establish Standard No. 218, which applies to all new helmets designed for use by motorcyclists and other motor vehicle users. Standard No. 218 sets forth a series of performance tests to ensure that motorcycle helmets will reduce deaths and injuries to motorcyclists resulting from head injuries.

When a safety standard like Standard No. 218 is in effect, section 108 (a)(1)(A) of the Safety Act (15 U.S.C. 1397 (a)(1)(A)) provides that no person shall "manufacture for sale, sell, offer for sale, or introduce or deliver for introduction in interstate commerce, or import into the United States" any motorcycle helmet unless that helmet is in conformity with Standard No. 218 and is covered by a certification issued under section 114 of the Safety Act (15 U.S.C. 1403).

This statutory requirement that every motorcycle helmet be covered by a certification pursuant to section 114 of the Safety Act means that the United States follows a different approach to ensuring conformity with its motor vehicle safety standards than do some other countries. In the European countries, for example, a helmet manufacturer would deliver a sample of its helmets to a governmental entity for approval, before any of those helmets can be offered for sale. The governmental entity would then conduct testing and, assuming the helmet passed the tests, assign an approval code to these helmets. The manufacturer could offer this type of helmet for sale after it receives this government approval code.

The United States follows a substantially different approach. Instead of putting the burden on the government to initially decide if a motorcycle helmet or other item of motor vehicle equipment complies with all applicable safety standards, the Safety Act puts the burden on the manufacturer of the motorcycle helmet. It is the motorcycle helmet manufacturer that must, in the first instance, determine whether its helmets conform to Standard No. 218. Once the manufacturer is satisfied that its helmets conform to the requirements of the standard, it certifies that conformity by labeling the symbol DOT on the helmet, pursuant to S5.6.1(e) of Standard No. 218. The manufacturer may offer its helmet for sale as soon as it has certified the helmet as conforming with Standard No. 218.

For enforcement purposes, NHTSA periodically purchases certified motorcycle helmets and tests them to the specific requirements of Standard No. 218. If, as is the case in the vast majority of instances, the helmets conform to all the requirements of the standard, no further action is taken. If the helmets are determined not to conform to all the requirements of the standard, the manufacturer is liable to notify owners of the noncompliance and to remedy the noncompliance without charge to the consumer, pursuant to sections 151-159 of the Safety Act (15 U.S.C. 1411-1419). In addition, the helmet manufacturer would be liable for a civil penalty of up to $1,000 for each noncomplying helmet it manufactured, pursuant to section 109 of the Safety Act (15 U.S.C. 1398).

I hope this information is helpful. Please feel free to contact Dorothy Nakama of my staff at this address or by telephone at (202) 366-2992 if you have any further questions or need additional information.

ID: nht92-7.14

Open

DATE: May 6, 1992

FROM: Peter K. Brown -- President, KC HiLites

TO: Paul Jackson Rice -- Chief Counsel, NHTSA

TITLE: None

ATTACHMT: Attached to letter dated 6/15/92 from Paul J. Rice to Peter K. Brown (A39; Std. 108)

TEXT:

I wrote to you in April of 1990, regarding your opinion and interpretation of the law relative to hi and low beam headlight use.

The product in question is called, the quad beam and we have been selling it now since mid 1990, directed at vehicles with 4 headlamp systems.

In as much, as vehicles with 2 headlamp systems represent a good part of the vehicle population, and that most of the 2 headlamp equipped vehicles, use only the low beam filaments when on low beam and only the high beam filament when high beam is selected, has prompted me to write to you again.

Our quad beam will enable the low beam to work in conjunction with the high beam, which will dramatically increase the amount of light output.

My question then is, can our product legally be used on two headlamp systems, either sealed beam or replaceable bulb type?

I appreciate your help on this. I am including a copy of your previous letter for your reference.

ID: nht92-7.15

Open

DATE: May 6, 1992

FROM: Kevin B. Brown -- Manager, Fleet Services, EG&G Idaho, Inc.

TO: NHTSA

TITLE: VEHICLES PURCHASED FOR THE IDAHO NATIONAL ENGINEERING LABORATORY (INEL) THROUGH THE GENERAL SERVICES ADMINISTRATION (GSA) - KBB-09-92

ATTACHMT: Attached to letter dated 9/4/92 from Paul Jackson Rice to Kevin B. Brown (A39; Part 567)

TEXT:

EG&G Idaho, Inc. is the prime contractor for the Department of Energy, Idaho Field Office (DOE-ID) to procure and maintain all government-owned vehicles at the Idaho National Engineering Laboratory (INEL).

Vehicles are procured for DOE-ID through the General Services Administration (GSA). Occasionally truck chassis are purchased through GSA for subsequent mounting of service bodies to be used for official government business.

Our inquiry is to the 49 CFR 567 requirements for intermediate or final stage manufacture vehicle labeling. We would not be constituted as a merchant, or the first purchaser for resale.

The mounting body would be in accordance to the original equipment manufacturer of the vehicle, or the vehicle recommended by the body manufacturer. Following the service life of the vehicle, it may be excessed to another Federal or State agency, or sold to the public.

All vehicles assigned to the INEL are maintained to the manufacturer's specifications and to the Federal Motor Vehicle Safety Standards. A description of vehicles for subsequent mounting of service bodies are provided below:

New truck chassis or existing used; installing service bodies, dump bodies, van bodies, and related accessories. Trucks range in size from 8,500 pounds gross vehicle weight (GVW) to 48,000 pounds GVW.

Based on the above information, would EG&G Idaho need to be certified to install intermediate or final stage labels per 49 CFR 567? Please send your response to the following address:

Mr. Kevin B. Brown EG&G Idaho, Inc. P. 0. Box 1625 Idaho Falls, ID 83415-4103

If you should need additional information, please contact me at (208) 526-2075.

ID: nht92-7.16

Open

DATE: May 5, 1992

FROM: Paul Jackson Rice -- Chief Counsel, NHTSA

TO: John W. Phillips -- Project Engineer, Transportation Research Center of Ohio

TITLE: None

ATTACHMT: Attached to letter dated 3/20/92 from John W. Phillips to Office of Chief Council, NHTSA (OCC 7114)

TEXT:

This responds to your letter to this office dated March 20, 1992, in which you inquired whether the Hybrid III large male test dummy, Model No. H3-95-R with 1992 pelvis upgrade, manufactured by First Technology Safety Systems, is an "approved equivalent test device" for conducting the Federal Motor Vehicle Safety Standard (FMVSS) 202 test. I am sorry we could not respond to you on or before April 2 as you requested.

Standard 202, Head Restraints (49 CFR Part 571.202), specifies requirements for head restraints to reduce the frequency and severity of neck injury in rear-end and other collisions. S4.3 of the standard requires that "a head restraint that conforms to either (a) or (b) shall be provided" for certain seating positions. In Standard 202's demonstration procedures relating to the compliance option set forth in S4.3(a), S5.1(a) specifies use of a "dummy having the weight and seated height of a 95th percentile adult male with an approved representation of a human, articulated neck structure, or an approved equivalent test device."

The Model H3-95-R dummy is marketed by First Technology Safety Systems as a "95th Percentile Male Hybrid III Test Dummy." We therefore assume that it has the weight and seated height of a 95th percentile adult male. The only remaining issue of whether the dummy can be used under S5.1(a) is whether it has "an approved representation of a human, articulated neck structure."

In the preamble to the final rule establishing Standard No. 202, NHTSA provided clarification of the term "approved representation of a human articulated neck structure." The agency stated that a neck structure of a test device would be approved if it could be demonstrated by technical test data that the articulation of the neck structure represented that of a human neck. NHTSA indicated that approval could only be given to a structure sufficiently described in performance parameters to ensure reliable and reproducible test data. See 33 FR 2945-2946, February 14, 1968.

You did not provide any specifications or test data concerning the Hybrid III 95th percentile male dummy (Model H3-95-R). However, NHTSA conducted an extensive evaluation of the Hybrid III 50th percentile male dummy, including its neck, in the context of specifying its use (as one of two alternative 50th percentile male dummies) in Standard No. 208, Occupant Crash Protection, dummy. The specifications for the Hybrid III test dummy, for purposes of Standard No. 208, are set forth in Subpart E of 49 CFR Part 572. The specifications for the other 50th percentile male dummy used in Standard No. 208 are set forth in Subpart B of 49 CFR Part 572.

We understand that the Hybrid III 95th percentile male dummy is essentially a scaled version of the Hybrid III 50th percentile male dummy. We therefore approve a Hybrid III 95th percentile male dummy for purposes of Standard 202, so long as its neck structure is essentially the same as that of the Part 572 Hybrid III test dummy, other than minor differences related to adjustments for length. For the same reasons, we approve use of a 95th percentile male version of the dummy specified in Subpart B of 49 CFR Part 572, so long as its neck structure is essentially the same as that specified in Part 572, other than minor differences related to adjustments to length.

I hope the above information will be of assistance to you. If you have any further questions with regard to this matter, please feel free to contact Walter Myers of my staff at this address or by telephone at (202) 366-2992.

ID: nht92-7.17

Open

DATE: May 5, 1992

FROM: Paul Jackson Rice -- Chief Counsel, NHTSA

TO: Tm Kozy -- Marketing Director, Infini Med

TITLE: None

ATTACHMT: Attached to letter dated 3/24/92 from Tm Kozy to Office of the Chief Council, NHTSA (OCC 7145)

TEXT:

This responds to your March 24, 1992 letter concerning "adaptive aids (hand controls) in cars equipped with air bags." I am pleased to have this opportunity to explain our regulations to you. Your two questions and the response to each follows.

1. Is it illegal to install a hand control unit that is drilled into the steering column that, according to the bulletin issued by Chrysler Corporation referring to the Federal Motor Vehicle Safety Standard 208, voids the warranty on the air bag as it may render the system inoperative.

To the extent you are seeking information about warranty claims, NHTSA has no authority to regulate those issues. Therefore, I cannot comment on the effect installation of hand controls might have on a warranty. The only Federal agency that has authority to regulate questions relating to warranties in general is the Federal Trade Commission. If you wish to contact that agency for further information regarding warranty questions, you may write to: Mr. Barry J. Cutler, Director, Bureau of Consumer Protection, Federal Trade Commission, Pennsylvania Avenue at Sixth Street, N.W., Washington, D.C. 20580.

I will, however, discuss the implications of the laws and regulations administered by this agency on the installation of hand controls in motor vehicles. Section 103 of the National Traffic and Motor Vehicle Safety Act (the Safety Act; 15 U.S.C. 1392) authorizes NHTSA to issue Federal Motor Vehicle Safety Standards that set performance requirements for new motor vehicles and new items, of motor vehicle equipment. Manufacturers are required to certify that their products meet all applicable safety standards. NHTSA periodically tests certified products to ensure that they do, in fact, comply with applicable standards, and investigates allegations that products contain defects related to motor vehicle safety.

If a new vehicle were altered by installation of adaptive controls prior to the vehicle's first sale to a consumer, the person making the installation would be considered an "alterer" and would be required by 49 CFR Part 567, Certification, to certify that the vehicle continues to comply with all applicable safety standards affected by the alteration. With respect to the installation of adaptive controls at a driver's position equipped with an air bag, the party making such an installation would be obliged to certify that the air bag is capable of functioning at least as well with the adaptive control installed as it functioned before the installation.

After the first sale to a consumer a vehicle is no longer required by Federal law to conform to all safety standards, and persons modifying the vehicle are no longer required to attach certification labels. However, S108 (a)(2)(A) of the Safety Act provides as follows:

No manufacturer, distributor, dealer, or motor vehicle repair business shall knowingly render inoperative, in whole or part, any device or element of design installed on or in a motor vehicle or item of motor vehicle equipment in compliance with an applicable Federal motor vehicle safety standard...

This provision obliges any manufacturer, dealer, distributor, or repair business that installs adaptive controls in vehicles equipped with air bags at the driver's position to ensure that such installation does not "render inoperative," or interfere with, the protection afforded the driver by the air bag. Violations of this "render inoperative" prohibition in the Safety Act are punishable by civil fines of up to $1,000 per violation. I note that S108 (a)(2)(A) does not affect modifications made by vehicle owners to their own vehicles.

Finally, under the Safety Act, adaptive controls would be considered items of motor vehicle equipment. There are currently no Federal motor vehicle safety standards that apply to adaptive controls as a separate item of motor vehicle equipment. However, although no safety standards apply directly to adaptive controls as a separate item of motor vehicle equipment, manufacturers of adaptive controls are subject to the requirements in SS151-159 of the Safety Act concerning the recall and remedy of products with safety defects. In the event that NHTSA or a manufacturer determines that a manufacturer's product contains a safety related defect, the manufacturer is responsible for notifying purchasers of the defective equipment and remedying the problem free of charge.

2. I need to know if such a unit were installed on an air bag equipped vehicle, and that same vehicle is resold in, say a year or two, is the seller required by law to notify the next buyer that the warranty on the air bag system has been voided, even though the controls may now have been removed.

At the outset, I must again note that this agency has no authority over warranty issues or alleged unfair trade practices. Any such questions should be addressed to the Federal Trade Commission at the address given above. My answer is limited to obligations imposed by the Safety Act and the standards and regulations issued by this agency pursuant to that Act.

The "render inoperative" provision of the Safety Act does not impose an affirmative duty on dealers to replace equipment that was previously removed by someone else, or to repair equipment that was damaged in a crash. Thus, the "render inoperative" provision does not require a dealer to replace an air bag that does not function because of something that happened before the dealer took possession of the vehicle, including the installation of hand controls. Moreover, nothing in the Safety Act imposes a duty on dealers of used vehicles to disclose information to purchasers. Notwithstanding the absence of any such requirements in the Safety Act, a dealer may be required by State law to repair or replace the air bag in these circumstances. For further information on the provisions in various State laws, you may contact: the American Association of Motor Vehicle Administrators, 4600 Wilson Boulevard, Arlington, Virginia 22203.

I hope you find this information helpful. If you have further questions or need some additional information in this area, please contact Mary Versailles of my staff at this address or by telephone at (202) 366-2992.

ID: nht92-7.18

Open

DATE: May 5, 1992

FROM: Stephen Newmark

TO: Jerry Curry -- NHTSA

TITLE: None

ATTACHMT: Attached to letter dated 5/27/92 from Frederick H. Grubbe to Phil Gramm (A39; Part 555)

TEXT:

I have been in contact with Congressman Geron's office concerning the formation of a Texas based company (Lonestar Classics Inc.) which will manufacture kit or reproduction automobile packages. We have been advised that an exemption is available to companies whose production does not exceed 10,000 units during a four year period in so far as Department of transportation safety standards are concerned. Our initial projections are that we would produce approximately 600 such units per year and are hereby requesting said exemption. It is our intent to use this exemption to obtain certificate of origin forms from the State of Texas which would otherwise require proof of our having met the aforementioned standards. We will in any case, make certain that our advertising clearly indicates that such standards have not been met. If you require any additional information, please feel free to contact me at 817-267-6241 or at the address listed below.

ID: nht92-7.19

Open

DATE: May 5, 1992

FROM: John W. Arnold Jr.

TO: NHTSA, U.S. Dept. of Transportation

TITLE: None

ATTACHMT: Attached to letter dated 6/22/92 from Paul J. Rice to John W. Arnold, Jr. (A39; VSA 108(a)(2)(A))

TEXT:

On 4-22-92 I had bucket seats installed in my 1992 Dodge Diesel Ram pickup (standard sized - not extended cab) by a vehicle accessories dealer, Orig. Equip of San Angelo, Texas. The newly installed seats seemed so totally unsafe that I removed them and reinstalled the original bench seat. Are such dealers required to meet Federal motor vehicle safety standards? If so I would like to file a complaint -- if not, they should be. Thank you.

ID: nht92-7.2

Open

DATE: May 15, 1992

FROM: Douglas Berg -- President, Ascend Productions

TO: NHTSA Legal Council

TITLE: None

ATTACHMT: Attached to letter dated 7/28/92 from Paul J. Rice to Douglas Berg (A39; Std. 125)

TEXT:

As highway safety authorities you are aware of the danger motorists are subjected to when they have a problem on the highway and must stop on the side of the road. Motorists and passengers run the risk of being hit by passing traffic or otherwise suffering further, when they are unable to exclaim their need for help. According to the National Highway Traffic Safety Admin. 45,000 injuries and 367 deaths occurred in the U.S. last year as motorists worked on there vehicle, walked for or awaited help.

No safe and effective means exists for motorists to communicate a distress. According to Phil Hartman of the American Automobile Association, 23 million out of the 32 million AAA members were in need of road service last year. That is over 70% or 2 in every 3 drivers.

We would greatly appreciate your recognition and support for Ascend Productions' HAZARD HELPER Safety Sign and Motorists Safety Program. Our hope is that this product and program represent the new standard of communication for motorists in distress. The HAZARD HELPER Safety Sign eliminates the ambiguity surrounding the unclear and dangerous situations when a motorist must stop, whether it be a medical emergency, a mechanical breakdown, a rest stop, or even to await for known assistance. This new standard will make driving safer and less worrisome for the millions of motorists who become disabled every year.

The HAZARD HELPER Safety Sign displays two universal symbols: On one side are two help needed symbols and on the other side, two hazard alert symbols. Two symbols are used so both direction of traffic are alerted with the same message. The American version of this product uses yellow retroreflective sheeting as a background to be consistent with current Federal highway (warning signage. The triangle is used universally to represent warning or hazard and is used to symbolize hazard alert for motorists. The help needed symbols compliment the current human-hazard road signage. The human-like figure universally personifies the nonverbal exclamation for help. These symbols are represented in black on the American version of this product to effectively contrast the yellow (warning) background. The European version of the HAZARD HELPER Safety Sign has red symbols on a white background.

We know that there are limits on the forms of advocacy or recognition that the NHTSA could give this sort of matter. We would truly appreciate any and all support for this Safety Program and Product. At the very least, a short letter written at your convenience, back to us at Ascend would help enormously in transforming this vision into reality as we begin to make the public and media aware of the HAZARD HELPER Safety Sign. Please call with any questions or comments at 1-800-972-6633, we would love to have your feedback.

ID: nht92-7.20

Open

DATE: May 1, 1992

FROM: Ray Wyatt

TO: Chief Counsel -- NHTSA

TITLE: None

ATTACHMT: Attached to letter dated 10/14/92 from Paul Jackson Rice to Ray Wyatt (A40; Part 567; VSA 102)

TEXT:

I have a race car that was made for racing only, and I would like to do the necessary work to the car to make it street legal. Can you give me information on the requirements I would have to meet?

Also, if I am successful at converting the car for street use, would the requirements be different if I wanted to sell the car or others like it?

ID: nht92-7.21

Open

DATE: April 30, 1992

FROM: Timothy C. Murphy -- Chairman, TSEI Engineering Committee (Lights), Transportation Safety Equipment Institute

TO: Paul Jackson Rice -- Chief Counsel, NHTSA

TITLE: Re: Request for Interpretation

ATTACHMT: Attached to letter dated 5/27/92 from Paul J. Rice to Timothy C. Murphy (A39; Std. 108)

TEXT:

In adopting the definition of "effective projected luminous lens area," NHTSA declined to adopt the SAE language dealing with lens parts, "even if they do not contribute significantly to the total light output." The agency went on to state, "(t)o be fully effective the lamp must project light in an appropriate manner. (Federal Register, p. 50182-4 Vol. 55, No. 234/Dec. 5, 1990).

On behalf of the Transportation Safety Equipment Institute (TSEI)* I would like to obtain an interpretation whether the lens leg of various lamp assemblies may be included in the calculation of 75 square centimeters or 11.625 square inches.

Figure 1 attached graphically shows that the last optic against the lens leg projects light outward beyond the lens leg and yet the light may be beneficial to meeting the twenty degree outward test points for stop, tail, turn lamps. Therefore I would conclude that this light, although low in intensity due to its distance from the filament, may be significant as far as meeting the photometric requirements of the lamp.

I request a ruling from NHTSA on how the agency would interpret the use of lens rims or legs to fulfill the 75 square centimeters requirements.

* TSEI is a non-profit trade association, representing North American manufacturers of vehicle safety equipment, including headlighting and signal lighting products, rearview mirrors, reflex reflectors, emergency lighting and other safety equipment for emergency, service and related vehicles and emergency warning triangles.

Attachment Figure 1 omitted.

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.