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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 10501 - 10510 of 16517
Interpretations Date

ID: nht79-3.37

Open

DATE: 03/27/79

FROM: AUTHOR UNAVAILABLE; F. Berndt; NHTSA

TO: International Salt Co.

TITLE: FMVSS INTERPRETATION

TEXT: This responds to your letter of January 29, 1979, asking whether folding front seats on a two-door, 1978 Chevrolet Malibu are required to have locking devices.

The answer to your question is yes. Federal Motor Vehicle Safety Standard No. 207, Seating Systems, (49 CFR 571.207) specifies in paragraph S4.3 that "a hinged or folding occupant seat or occupant seat back shall be equipped with a self-locking device for restraining the hinged or folding seat or seat back and a control for releasing that restraining device."

You stated in a telephone conversation with Hugh Oates of my office that your 1978 Malibu does not have such a restraining device, either manual or inertia-activated. Our Office of Vehicle Safety Compliance has found, however, that the front seating system of the 1978 Chevrolet Malibu two door sedan does in fact have a seat back locking device that is actuated by an inertia system. This system has been certified by General Motors Corporation as meeting the performance requirements of Federal Motor Vehicle Safety Standard No. 207. A description of this system is found on page four of section one in the owner's manual. If the inertia restraint system in your vehicle does not perform as described, you should contact your Chevrolet dealer.

Sincerely,

ATTACH.

January 29, 1979

Office of Chief Counsel -- NHTSA

Dear Sir:

Please advise me whether or not the folding front seats on a two door 1978 Chevrolet Malibu are required to have a locking device.

Sincerely,

Barbara A. Loureiro -- INTERNATIONAL SALT COMPANY

ID: nht79-3.38

Open

DATE: 03/01/79

FROM: AUTHOR UNAVAILABLE; F. Berndt; NHTSA

TO: Ford Motor Company

TITLE: FMVSS INTERPRETATION

TEXT: This responds to your recent petition to amend Safety Standard No. 210, Seat Belt Assembly Anchorages, to exempt active lap belts installed in conjunction with passive upper torso restraints from the anchorage location requirements of the standard.

The agency has determined that amendment of the standard as you request is unnecessary since active lap belts and their associated anchorages are not required to comply with Federal safety standards if installed voluntarily by a manufacturer in addition to a single, diagonal passive belt. The passive restraint requirement of Safety Standard No. 208 will require passive protection in frontal crashes and, either passive protection in lateral and rollover crash modes or the provision of Type I or Type II active belts for protection in lateral and rollover crash modes. The agency has previously stated, most recently in a letter to Volkswagen dated August 1, 1977, that the provision in S4.5.3 of Standard No. 208 allowing the substitution of any passive belt system (whether or not including a lap belt) for any other belt system otherwise required, is intended to apply to the provisions of S4.1.3(c) that specify either passive protection or the provision or Type I or Type II belts.

Since active lap belts installed in conjunction with single, diagonal passive belts are not required, they are voluntary additions by the manufacturer. The agency has stated in past interpretations that systems or components installed in addition to required safety systems are not required to meet Federal safety standards, provided the additional components or systems do not destroy the ability of required systems (the passive belt in this case) to comply with Federal safety standards. This means that your proposed restraint system would have to meet the frontal crash protection requirements of Standard No. 208 both with and without the active lap belt fastened.

Since the change you requested is unnecessary in light of this interpretation, the agency will consider your petition withdrawn.

SINCERELY,

Ford Motor Company

December 14, 1978

Joan B. Claybrook Administrator Nationalk Highway Traffic

Safety Administration

Dear Ms. Claybrook: Re: Petition for Amendment of Federal Motor Vehicle Safety Standard No. 210 - Seat Belt Assembly Anchorages

Ford Motor Company (Ford), pursuant to Section 124 of the National Traffic and Motor Vehicle Safety Act, as amended, and 49 CFR, Section 552.3, submits this Petition for Amendment of Federal Motor Vehicle Safety Standard (FMVSS) No. 210, Seat Belt Assembly Anchorages (49 CFR 571.210) hereinafter "the Standard". Ford requests the Standard be amended to exempt active lap belts used in conjunction with passive upper torso restraints from the location requirements specified in S4.3.1.1.

Ford plans to offer in two of its 1980 passenger cars an optional passive belt restraint system for front seat occupants. This optional passive belt system will include a passive upper torso restraint, knee bolsters and an active lap belt. The active lap belt when used will provide additional protection to occupants in side and rollover type accidents. The passive belt system will comply with the passive restraint criteria required by Section 4.5.3 of FMVSS 208 with the without the active lap belt being employed. One of the design configurations of the active lap belt being developed, however, does not meet the anchorage location requirements of the Standard.

In this design, the lap belt retractor will be located on the inboard side of the bucket seat and its anchorage is located forward of the zone specified in Section 4.3.1.1 of the Standard. This configuration will permit forward motion (translation) of the occupant in a crash, which in turn will allow the occupant's knees to contact the knee bolster -- a desirable circumstance. We believe permitting increased forward translation of the occupant will result in more efficient distribution of impact forces during a frontal collision.

As the Administration indicated in its preamble to Docket 72-23; Notice 5, published November 16, 1978, ". . . the agency has determined manufacturers should be given wide latitude in passive belt design in order to facilitate the early introduction of passive systems. . . ." In a similar sense, this request for amendment will contribute to earlier introduction of passive systems. Further, if this petition is not granted on a timely basis, it could hinder our efforts to introduce a passive belt option prior to the required incorporation date.

As Ford intends to certify that vehicles equipped with the passive belt meet the injury requirements of Standard 208 with and without the active lap belt, and because the additional active lap belt will provide added protection in side and rollover accidents, we believe this petition, if granted, should contribute to the safety of front seat occupants.

Ford, therefore, respectfully requests that the last sentence of S4.3 of Standard 210, Seat Belt Assembly Anchorages (49 CFR 571.210) be amended as follows (added text indicated by underlining):

"S4.3 . . . Anchorages for passive belt systems that meet the frontal crash protection requirements of Standard No. 208, and active lap belt systems, installed in conjunction with such passive belt systems, are exempt from the location requirements of this section."

J. C. Eckhold Director Automotive Safety Office (Graphics omitted)

ID: nht79-3.39

Open

DATE: 12/27/79

FROM: AUTHOR UNAVAILABLE; F. Berndt; NHTSA

TO: Professional Automotive Consultant

TITLE: FMVSS INTERPRETATION

TEXT: This responds to your recent letter asking about the applicable Federal requirements for seat belts in a pickup truck that has been modified to be a convertible by removal of the top. Specifically, you ask what should be done with the shoulder portions of the seat belt assemblies in these vehicles.

I am enclosing for your information a past agency interpretation concerning this same question. You will note that the modified pickup must be in compliance with the Federal safety standards that would have been applicable to a convertible truck at the time the pickup was originally manufactured. Since Safety Standard No. 208, Occupant Crash Protection, permits convertible trucks to be equipped with either Type 1 belts (lap belts) or Type 2 belts (lap and shoulder combination belts) at front outboard designated seating positions, the modified pickup would only be required to have a lap belt. Of course, your client is certainly permitted to retain the lap and shoulder belt if he chooses. We cannot, however, recommend how the shoulder portion of the belt assembly should be attached to the modified vehicle.

Sincerely,

ATTACH.

November 7, 1979

Francis Armstrong, Director -- Office of Vehicle Compliance Enforcement, National Highway Traffic Administration, U.S. Dept. of Transportation

Dear Mr. Armstrong:

I am currently working with a client who is involved with a "Conversion" whereby the top of a pickup truck cab is cut behind the windshield and slightly above the rear bed height. After cutting this top off of the cab, it is fitted with moulded gaskets and held by four (4) aircraft quality latches to produce a convertible truck.

My questions are not concerned with the above process. I am now concerned about the shoulder harness and where it should be located. Naturally the harness becomes inoperable when the top is removed since the factory harnesses are pivoted in the top.

I would think that under the circumstances this finished vehicle should be treated as any other "convertible" with respect to seat belts and harnesses.

Please enlighten me as to what you suggest I should advise my client to do with respect to the relocation or elimination of the detachable upper torso portion of the seat belt assembly.

I thank you very much for your interest in this matter and look forward to your prompt reply.

Sincerely,

Don Johnson -- PROFESSIONAL AUTOMOTIVE CONSULTANT

ID: nht79-3.4

Open

DATE: 10/04/79

FROM: FRANK BERNDT -- NHTSA; SIGNATURE BY STEPHEN P. WOOD

TO: Stratos Corporation

TITLE: FMVSS INTERPRETATION

TEXT: This is in response to the questions you raised with Ms. Debra Weiner of my office on July 12, 1979, about your company's plans to manufacture auxiliary gasoline tanks for passenger cars. You noted that the tanks will be designed for placement in the trunk above the existing fuel tank and that your company will act primarily as a manufacturer of these tanks but may do some installation. Specifically, you asked what Federal regulations or standards would apply to the manufacturer, as well as the placement and installation, of auxiliary gasoline tanks in motor vehicles. You also asked whether we have testing facilities for such tanks and, if so, whether the agency would be able to test one of your company's tanks.

The National Traffic and Motor Vehicle Safety Act, as amended 1974, (the Act) authorizes the National Highway Traffic Safety Administration (NHTSA) to issue motor vehicle safety standards applicable either to entire vehicles or to equipment for installation in vehicles. Safety Standard No. 301-75, Fuel System Integrity, (copy enclosed) is a vehicle standard which applies to certain vehicles, including passenger cars, that use fuel with a boiling point above 32 degrees F. The standard applies to completed vehicles rather than to fuel tanks or other fuel system components and thus is inapplicable to the manufacture of auxiliary fuel tanks.

Despite the inapplicability of Safety Standard No. 301-75 to their manufacture, auxiliary fuel tanks must be designed and manufactured for safety. As a manufacturer of auxiliary fuel tanks, you would be subject to the defects responsibility provisions of the Act (sections 151 et seq., copy enclosed). Upon discovery of a safety-related defect by the Secretary of Transportation, the NHTSA Administrator, or yourself, you would be required to notify vehicle owners, purchasers, and dealers and remedy the defect.

If you installed an auxiliary fuel tank in a new vehicle, prior to its first purchase in good faith for purposes other than resale, you would be a vehicle alterer under NHTSA regulations. As an alterer, you would be required by 49 CFR 567.7 to affix an additional label to the vehicle stating that, as altered, the vehicle conforms to all applicable Federal motor vehicle safety standards -- including Safety Standard No. 301-75. Should a noncompliance or safety-related defect be discovered in such a vehicle, as a result of the modification, you would be required to notify vehicle owners, purchasers, and dealers and to remedy the defect.

If you installed an auxiliary gasoline tank in a used passenger vehicle, you would not be required to attach an alterer's label. However, section 108(a)(2)(A) of the Act would apply. Section 108(a)(2)(A) provides in relevant part that:

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 . . .

Thus, if you added an auxiliary tank to a used passenger vehicle manufactured in compliance with Safety Standard No. 301-75 and other standards, and in the process knowingly rendered inoperative the compliance of the fuel system or another system, you would be in violation of section 108(a)(2)(A).

I would like to point out that in addition to the Federal law discussed above there may be State product liability laws applicable to your company's proposed activities. Therefore, you may wish to consult a local lawyer before your company begins manufacturing and installing auxiliary gasoline tanks.

At the present time, NHTSA is not testing auxiliary gasoline tanks, but the agency is involved in testing vehicles to determine their compliance with Safety Standard No. 301-75.

At some point the agency will probably begin testing auxiliary tanks that have been installed in vehicles, but such testing will be done only as part of our enforcement efforts. It is not a policy of the NHTSA to test and approve the products of particular manufacturers of motor vehicles or motor vehicle equipment.

In conclusion, please note that, in general, the National Highway Traffic Safety Administration discourages the use of auxiliary fuel tanks of any kind because of the grave dangers of fire and explosion posed by their improper manufacturer or installation. In the near future, this agency will be making a press release warning consumers of these hazards and discouraging them from using auxiliary fuel tanks.

I hope that you will find this response helpful and have not been inconvenienced by our delay in sending it to you.

ID: nht79-3.40

Open

DATE: 11/06/79

FROM: AUTHOR UNAVAILABLE; Joan Claybrook; NHTSA

TO: Hon. J. D. Dingell - H.O.R.

TITLE: FMVSS INTERPRETATION

TEXT: This responds to your recent letter on behalf of your constituent, Mr. Donald Edwards. Mr. Edwards asks whether the passenger seat in a 1979 Dodge van is required under Federal law to be equipped with a safety belt.

Your earlier answer to Mr. Edwards was correct. Federal Motor Vehicle Safety Standards require light trucks (including vans) to be equipped with safety belts for each designated seating position. The passenger seat in Mr. Edwards' van would qualify as a designated seating position and would be required to have a safety belt.

Under the Federal certification regulations for motor vehicles, any person who alters a vehicle prior to its first purchase for purposes other than resale is required to place an additional label on the vehicle certifying that, as altered, the vehicle continues to be in compliance with all applicable safety standards (49 CFR 567.7). This provision would apply to the dealer who altered Mr. Edwards' vehicle by adding the passenger seat. The label would certify that the vehicle was still in compliance with all standards, including the safety belt requirements. Since the dealer did not install a safety belt, he probably did not place an alterer's label on the vehicle and he would, therefore, be in violation of the certification regulation. If this is the case, the agency has authority to require the dealer to remedy the noncompliance by installing safety belts on the van. Additionally, the dealer could be liable for civil penalties up to $ 1,000 for failure to comply with the Federal safety standards and regulations.

If Mr. Edwards has any problems in obtaining the required safety belts after receiving this information, please have him contact our Office of Enforcement at 400 Seventh Street, S.W., Washington, D.C. (202/426-9700).

Sincerely,

ENC.

cc: MR. OATES; JUDIE STONE

Congress of the United States House of Representatives

October 22, 1979

The Honorable Joan Claybrook Administrator National Highway Traffic Safety Administration Department of Transportation

Dear Ms. Claybrook: I am enclosing for your attention a copy of information sent to me by my Distrect Office concerning Mr. Donald Edwards question as to the requirement that seat belts be located at all seating positions in motor vehicles. I have advised Mr. Edwards that the National Traffic and Motor Vehicle Safety Act of 1966 does, in my estimation, require such seating positions for occupants to be equipped with safety belts.

I would appreciate it if you would respond to me as to Mr. Edwards question relative to the dealership having told him that a safety belt was not necessary under Federal law for the optional passenger seat in the van he recently purchased.

With best wishes,

John D. Dingell Member of Congress

ENC.

INFORMATION TAKEN BY: District Office Cindy

DATE: September 24, 1979

NAME OF CALLER: Mr. Donald Edwards

STREET ADDRESS: 5000 Ternes Street

CITY, STATE, ZIP CODE: Dearborn, Michigan 48126

TELEPHONE NUMBER: 584-5924

OTHER INTERESTED PARTIES:

DETAILS OF CALL: 1979 Dodge Van

Mr. Edwards bought a 1979 Dodge Van, B100 Cargo van, at Crestwood Dodge, 32850 Ford Road, Garden City, Michigan 48135. The driver's seat came equipped with a seat belt that doesn't work, but he is going to have the dealer fix it. The passenger seat, which is an option, does not have a seat belt. Mr. Edwards stated he paid $ 80 for the seat, but it is not listed on the bill of sale. The dealership claims they threw it in. Mr. Edwards would like to know if it is a federal law that every seat in a vehicle has to have a seat belt. The dealership is telling him no. If it is a federal law requiring seat belts in vehicles, Mr. Edwards would like to have a copy of it.

National Traffic and Motor Vehicle Safety Act of 1966.

ID: nht79-3.41

Open

DATE: 08/07/79

FROM: AUTHOR UNAVAILABLE; Joan Claybrook; NHTSA

TO: Chrysler Corporation

TITLE: FMVSS INTERPRETATION

TEXT: This responds to your letter about Chrysler's general need for relief from Federal regulations and the denial of its petition for a one-year exemption from the automatic restraint requirements for Chrysler 1982-model full-size cars. There are several statements by Chrysler regarding the petition denial that you wish placed in the public record. Accordingly, your letter has been placed in the public docket on occupant crash protection (74-14; General Reference).

This agency is fully appreciative of the significance of Chrysler's circumstances and needs. Where relief can be considered consistent with the spirit and provisions of the laws we administer, we will do so. This willingness was amply demonstrated by my recent action in reducing the 1981 fuel economy standard for light trucks. Chrysler's automatic restraint petition presented us with a substantially different situation. Under our statutory authority, the only way we could have exempted Chrysler's large-size 1982 model from compliance with the automatic restraint requirements would have been to classify that vehicle as a unique type of car under our exisiting authority. Clearly, such a classification would have been challenged in court, and we believe it would not have been sustained. Indeed, such an action would severely strain our credibility with the court which just recently reviewed that very issued.

Regarding your statements about the safety issues associated with the denial, the agency agrees that some safety belt reminder systems can be effective in encouraging belt use. We do not believe, however, that most simple warning systems can equal the life-saving potential of automatic restraints. Further, the NHTSA has no authority under the National Traffic and Motor Vehicle Safety Act to require ignition interlock systems, which are probably the most effective systems for encouraging use of manual belts.

In this particular matter, the law precludes us from granting the relief you seek. I regret that we are unable to assist you under these circumstances.

SINCERELY,

July 12, 1979

The Honorable Joan Claybrook Administrator National Highway Traffic Safety Administration

Dear Ms. Claybrook:

We have reviewed the NHTSA denial of our petition for a one-year exemption from MVSS 208 for Chrysler 1982 model year full-size cars. We are revising our product and capital plans accordingly; nonetheless, we are convinced that the reasons set forth by NHTSA in its denial of our petition are in error. There are three basic arguments in the statement of denial: that there will be a significant reduction in safety if these cars do not have passive restraints, that Chrysler can produce cars with passive restraints at a competitive price, and that the economic risks to Chrysler would be "slight." We cannot agree with these conclusions and believe that the public record should include the following comments:

Safety

The NHTSA estimates that an average of fifteen lives per year would be lost if 1982 Chrysler full-size cars were not equipped with passive restraints. Although the calculations were not made public, presumably they are based in part on the historical NHTSA overestimation of passive restraint benefits. In addition, Chrysler and NHTSA staff had discussed informally improved safety belt reminder systems for the cars in question. NHTSA researchers have found that improved reminders increase belt use sharply, and cars so equipped could equal or exceed the performance of passive restraint cars at a small fraction of the cost. The NHTSA did not even mention this approach in its denial.

Consumer Cost of Passive Restraints

The NHTSA contends that Chrysler can build full-size cars with passive restraints in 1982 at a cost comparable to its competitors. It cannot. A major part of the price of any car or component is amortization of capital expenses necessary to bring it to production. The basic reason for our petition was the short life and low volume of cars over which we could amortize costs. Our competitors can spread costs over more years of production, and over more cars per year. Without question our costs per vehicle would be much higher than the corresponding ones from Ford and General Motors.

A corollary NHTSA argument is that a passive restraint exemption would give Chrysler a competitive advantage. It is widely understood that Chrysler already is at a serious competitive disadvantage because the costs of compliance with federal regulations are much higher, per unit, than for Ford and General Motors, and that this disadvantage will continue into the foreseeable future. The passive restraint exemption would do no more than reduce this price disadvantage -- a little.

Capital Expenses

The costs of meeting a multiplicity of federal regulations is causing an enormous financial strain on Chrysler Corporation. This is not only our contention, but also the conclusion of every researcher who has examined the automobile industry recently. All studies found that because of federal regulation Chrysler will suffer in comparison to Ford and General Motors. All of these studies are known to NHTSA and some were done specifically for the agency. In saying that the cost to provide passive restraints for one year "can be borne by Chrysler without significant difficulty," the agency simply ignores facts. Chrysler is already at its limit and can bear not additional capital costs without extreme difficulty.

We did not expect our petition to be denied. Over the past several months federal officials have gained increased understanding of the crushing burden federal regulations have placed on Chrysler Corporation, and the competitive disadvantages they have created. These officials have recognized that some measure of relief is necessary for Chrysler and have pledged that future government action would not damage the corporation further. This NHTSA denial is the first important decision since the need for revised government policy became apparent; instead of providing the expected relief, it makes an already difficult financial picture even worse.

JOHN J. RICCARDO -- CHAIRMAN

ID: nht79-3.42

Open

DATE: 12/31/79

FROM: AUTHOR UNAVAILABLE; F. Berndt; NHTSA

TO: American Motors Corporation

TITLE: FMVSS INTERPRETATION

TEXT: This responds to your recent letter requesting an interpretation of the warning system requirements for seat belts in Federal Motor Vehicle Safety Standard No. 208. The buckles of driver lap belts in all AMC vehicles and most Jeep vehicles are equipped with switches that prevent the audible belt use warning system from operating when the driver turns the ignition on after having fastened his or her lap belt. You ask whether the standard allows removal of the switch and associated wiring. The effect of this step, which would result in a savings of about $ 1.50 per vehicle, would be that the warning would operate regardless of whether the driver has fastened his or her lap belt. You also ask that your letter be considered a petition for rulemaking if this removal is not permissible.

Paragraph S7.3 of the standard requires a seat belt warning system that activates a 4 to 8-second warning light when the vehicle's ignition switch is moved to the "on" or "start" position (condition "a"), and a 4 to 8-second audible signal when condition "a" exists and the driver's lap belt is not fastened (condition "b"). Under your proposal, the audible signal would be activated when both conditions exist. However, it would also be activated when condition "a" alone exists.

The functioning of the audible signal when condition "a" only exists is not permissible under the standard. The rulemaking notices which led to adoption of the current requirement stated that the agency's intent was that the audible signal operate if the driver's lap belt is not in use. The agency expressed that same intent in the standard by specifying the light was to function when condition "a" existed and the audible signal when both conditions "a" and "b" existed. To interpret the standard to permit the signal to operate when condition "a" only existed would be to render purposeless the specification of condition "b".

Further, the agency denies your petition to amend FMVSS 208 to permit operation of the audible signal when condition "a" only exists. A greater limitation was placed on the operation of the audible warning signal in consideration of the irritation factor associated with the signal but not with the light. To provide a reminder and incentive for safety belt use and to avoid subjecting the conscientious belt user to having to hear an audible reminder to do something that he or she has already done, the agency specified that the signal would not function if the driver's safety belt were fastened.

In light of studies concerning the value of a properly designed belt use warning system in improving the rate of belt use, the agency is contemplating including a proposal to amend the FMVSS 208 warning requirements when it issues its forthcoming notice of proposed rulemaking on seat belt comfort and convenience. We would welcome your views on the proposal following its announcement.

Sincerely,

ATTACH.

November 19, 1979

Joan B. Claybrook -- Administrator, National Highway Traffic Safety Administration, U.S. Department of Transportation

Dear Ms. Claybrook:

This office is evaluating the feasibility and legal implications of a proposed product improvement. We are considering removing the driver's lap-belt buckle switch and associated wiring harness from the seat belt use reminder system currently installed on all AMC and most Jeep vehicles. We believe that eliminating this buckle switch would not detract from the effectiveness of the reminder system.

The lap-belt buckle switch functions to deactivate the audible signal when the driver's restraint system is fastened. We are of the opinion that the effect of its removal would be consistent with the law as stipulated in paragraph S7.3 of 49CFR571.208 and section 125 of the National Traffic and Motor Vehicle Safety Act, as amended.

Additional support for our opinion that the audible signal need not be belt-use sensitive apparently can be found in the preamble to Docket 74-39; Notice 3, the final amendment to FMVSS 208 which adopted the new reminder system requirements. In that notice, the NHTSA noted that its initial proposal had intended that the audible warning should be dependent on belt use, but that after consideration of comments received, the Agency determined that "Because of the limited benefit, the reminder should be provided at as low a cost as feasible." Therefore, the NHTSA "determined that an audible-visual combination will provide the best reminder at a cost commensurate with the benefits achievable in a limited-duration signal."

The removal of the lap-belt buckle switch would be consistent with these stated objectives. The achievable associated cost reduction is estimated to be approximately $ 1.50/vehicle, and because many, if not all, U.S.-marketed cars use designs with a similar buckle switch, an industry-wide potential savings of $ 15 million per year appears reasonable.

The resultant belt use reminder system would operate the same as today except that both the light and buzzer would activate for 4 to 8 seconds each time the ignition is turned on regardless whether the driver's belt is fastened. Such a system would not likely be judged unacceptable by the motoring public because we believe that the majority of belt users "buckle up" during the time that the reminder system is activated by the operation of the ignition switch. Therefore, the termination of the audible-visual signal would be essentially coincident with the occupant's fastening of the restraint system.

We ask for your prompt concurrence that such a reminder system would be consistent with Federal requirements. The timeliness of your response is important as the potential product savings and consumer price benefits could be realized almost immediately. Because this is a component deletion that does not require design or tooling time, we could implement this change soon after we receive a favorable response.

If you determine that our interpretation of the belt-use reminder system requirements is not correct, we ask that this request be considered as a petition for rulemaking to amend FMVSS 208 such that the audible signal may be, but is not required to be, driver belt-use dependent.

Sincerely,

K. W. Schang Director - Vehicle Safety Programs -- AMERICAN MOTORS CORPORATION

ID: nht79-3.43

Open

DATE: 10/15/79

FROM: AUTHOR UNAVAILABLE; G. Hunter for R. J. Hitchcock; NHTSA

TO: Rolls-Royce Motors Limited Car Division

TITLE: FMVSS INTERPRETATION

TEXT: This is in response to your letter of August 17, 1979, regarding the requirements in Federal Motor Vehicle Safety Standard (FMVSS) No. 208, Occupant Crash Protection, pertaining to the emergency release warning system for automatic belts.

Paragraph S4.5.3.3(b)(1) of the standard requires an audible and visible warning if the driver's automatic belt system is not in use, as determined by the belt latch mechanism not being fastened. On one of your automatic belt designs the latch mechanism consists of a pivoting bar which slips through a small stitched loop on the end of the belt webbing. You note that this latch mechanism can be fastened without the webbing being connected to the pivot bar, and that in such a case the warning system would not operate even though the belt is not in use. Therefore, you ask if you can install a switch in the automatic belt retractor to detect when insufficient webbing is extended from the retractor to engage with the latch on the door frame. You ask if such a system could be used as an alternative to the existing requirement or, if the standard could be amended to allow the alternative.

In answer to your question, a switch in the retractor of an automatic belt system would not satisfy the current warning system requirement if the system did not also include a switch in the emergency release latch mechanism. Further, the Agency does not believe that it is necessary to amend the standard to allow such an alternative. Although it may be true that the existing warning system could be defeated in a belt system such as you describe, the same is true with most warning system requirements. For example, if the standard provided the alternative you suggest, the automatic belt could be "tied-off" after sufficient webbing was withdrawn from the retractor and the warning system would be defeated. As you know, this method has been used to defeat the warning systems of many manual belts in the past. Therefore, we believe the existing requirement is sufficient to warn vehicle occupants that their automatic belt has been released and should be reconnected.

The "pivot-bar" release mechanism described in your letter appears to comply with the requirements of the standard. However, we believe that the bar should remain in the released position after the belt webbing has been removed so that the warning system will activate. In other words, we assume that the pivot bar does not re-latch automatically after being released but, rather, requires manual re-latching by the occupant.

Regarding your third question we have enclosed, for your information, Notice 14, Docket No. 1-18, which establishes the new requirements related to controls and displays.

ID: nht79-3.44

Open

DATE: 12/28/79

FROM: AUTHOR UNAVAILABLE; F. Berndt; NHTSA

TO: Toray Industrie, Inc.

COPYEE: HELENE B. TEKULSKY -- TECHNICAL DEVELOPMENT CENTER, MITSUI & CO. (USA), INC.

TITLE: FMVSS INTERPRETATION

TEXT: This responds to a letter we received from Mitsui & Company asking questions concerning the "resistance to light" test in paragraph S5.1(e) of Safety Standard No. 209, Seat Belt Assemblies, as it applies to polyester seat belt webbing. You asked whether it is true that this paragraph will not be enforced for dacron and polyester webbing until an appropriate test method can be incorporated in the standard, and whether such a test method is being developed.

In a July 23, 1976, letter to the Celanese Fibers Marketing Company the agency stated that the Standard No. 209 test procedure for resistance to light was developed to test nylon webbing and that the procedure does not give meaningful results for the new polyester webbings. Therefore, Celanese was informed that the requirement would not be enforced for polyester webbing until a new procedure could be developed. This letter was placed in our public docket for the benefit of all interested parties (in our "Redbook" interpretations file). The agency does not intend to place an announcement of this interpretation in the Federal Register, however, since the standard will soon be amended to incorporate an appropriate test procedure for dacron and polyester webbing.

The new test procedure was developed for the National Highway Traffic Safety Administration by the Narrow Fabrics Institute and the Society of Automotive Engineers Task Force on Webbing. The new procedure would require the use of a plain glass filter instead of the Corex B filter currently required. The agency anticipates rulemaking to incorporate this new procedure sometime early next year, depending on rulemaking priorities.

I am enclosing a copy of our 1976 letter to Celanese for your information.

Sincerely,

ENC.

JULY 23, 1976

John Turnbull -- Celanese Fibers Marketing Company

Dear Mr. Turnbull:

This responds to your March 19, 1976, recommendation that paragraph S5.1(c) of Standard No. 209, Seat Belt Assemblies, be amended to clarify that the temperature specified in the "resistance to light" test procedure is intended to be "black panel" temperature rather than "bare bulb" temperature.

The procedures outlined in Standard No. 209 for the "resistance to light" test were adopted from the Bureau Standards's procedures for testing seat belts. The standard was developed by an industry and government group, which included Celanese Fibers, as a simplification and improvement of the A.S.T.M. Designation E42-64 procedure. The "resistance to light" test was-established to test nylon webbing, which was the standard material used in seat belt webbing at that time.

We recognize, however, that the industry now uses dacron and polyester materials in seat belt webbing, and that the Standard 209 test procedure developed to test nylon does not give meaningful results for these new materials. Therefore, the National Highway Traffic Safety Administration does not enforce the requirements of paragraph S5.1(e) of Standard No. 209 in the case of seat belt webbing made of dacrons and polyesters, and will not until appropriate testing procedures can be developed and incorporated in the standard for these new materials.

Procedures for testing systems containing materials other than nylon are under development and we plan to initiate rulemaking to incorporate these procedures into standard 209. You should understand that our commencement of a rulemaking proceeding does not signify that the rule in question will be issued. A decision as to the issuance of the rule is made on the basis of all available information developed in the course of the rulemaking proceeding, in accordance with statute criteria.

We would appreciate any data you may be able to provide regarding colorfastness tests for fabrics other than nylon.

Sincerely,

HERLIHY FOR Stephen P. Wood -- Assistant Chief Counsel, NHTSA

November 16, 1979

HUGH OATES, ESQ. -- Office of the Chief Counsel, National Highway Traffic Safety Administration

Dear Mr. Oates:

We have been in contact with Mr. William Smith at NHTSA for the past two years regarding the enforcement of paragraph S5.1(e) of Standard No. 209, Seat Belt Assemblies, "resistance to light test" for polyester seatbelt webbing.

It is our understanding that an amendment to the above standard had been suggested as meaningful results for seatbelt webbing of dacrons and polyesters could not be ascertained from the test as it stands. We further understand that, until an appropriate testing method is devised, paragraph S5.1(e) of Standard 209 will not be enforced for dacron and polyester webbings.

What we would like to know is whether an announcement to the above effect will appear in the Federal Register, whether an alternative testing method is being developed, and if this is the case when the new method is expected to be adopted by NHTSA and incorporated into Standard 209.

We would appreciate it if you would send your written reply to our questions to the following gentleman and a copy of the letter sent to us.

Mr. Katsufumi Mitsui General Manager Industrial Textile Department Toray Industries Inc. 2-2, Nihonbashi-Muromachi, Chuo-ku, Tokyo, Japan

Should you have any questions, please feel free to give me a call at (212) 973-4880 to discuss them.

We look forward to hearing from you soon.

Very truly yours,

MITSUI & CO. (USA), INC.;

Helene B. Tekulsky -- Technical Development Center

cc: K. Mitsui;

W. Smith;

Mitsui - Tokyo

ID: nht79-3.45

Open

DATE: 08/21/79

FROM: AUTHOR UNAVAILABLE; F. Berndt; NHTSA

TO: Pacific & Atlantic Marketing Services

TITLE: FMVSS INTERPRETATION

TEXT: This responds to your June 21, 1979, request for information on how to obtain the National Highway Traffic Safety Administration's (NHTSA) approval for a child seating device, the G.T.A. Booster Cushion, you wish to market in the United States.

The National Traffic and Motor Vehicle Safety Act (15 U.S.C. 1381, et seq.), a copy of which is enclosed, does not authorize NHTSA to approve products. Section 114 of the Act requires "self-certification" by manufacturers that their products comply with applicable standards.

According to your letter, the product you wish to market is "designed primarily to raise children to see out the windows of an automobile" and is meant for children in the 5-10 year old age group. You also state that the device can be used with a lap or lap-shoulder seat belt or a child harness to restrain a child.

Federal Motor Vehicle Safety Standard No. 213, Child Seating Systems, establishes performance requirements for items of equipment used to seat a child being transported in a motor vehicle. Although the G.T.A. Booster Cushion does not have an integral restraint system, it could be covered by Standard No. 213 if it is designed to seat a child.

Standard No. 213 does not currently specify the size or age range of children to which the standard is applicable, while NHTSA's proposed Standard No. 213-80, a copy of which is enclosed, does specify a size range. In previously interpreting Standard No. 213, however, the agency has stated that the standard is intended to apply only to child restraints or seats for children weighing 50 pounds or under.

If the G.T.A. Booster Cushion will only be used by children larger than those intended to be covered by Standard No. 213, the G.T.A. Booster Cushion would not be required to meet the performance requirements of the standard. We note that the advertisement accompanying your letter makes no mention of any size or age limitations for children using the seat. Further, the agency is concerned that even if the seat and advertisement clearly indicated such limitations, the G.T.A. Booster Cushion will be bought for and used by children smaller and younger than those limits. Regardless of whether it is covered by the standard or not, the G.T.A. Booster Cushion is considered an item of motor vehicle equipment. Therefore, 1420) would apply to any safety-related defect in the G.T.A. Booster Cushion.

The agency is interested in learning of any test data that you have concerning the protection provided by use of the G.T.A. Booster Cushion. In particular, the agency is interested in learning of any tests comparing the protection provided by use of the G.T.A. Booster Cushion in conjunction with a lap or lap-shoulder seat belt, with the protection provided by use of only a lap or a lap-shoulder seat belt. Copies of that information should be sent to:

Mr. Ralph Hitchcock, Chief Crashworthiness Division Office of Vehicle Safety Standards National Highway Traffic Safety Administration 400 Seventh Street, S.W. Washington, D.C. 20590

If you have any further questions, please let me know.

SINCERELY,

PACIFIC & ATLANTIC MARKETING SERVICES

JUNE 21, 1979

Associate Administrator for Rule Making, National Highway Traffic Safety Administration,

Dear Sir,

I would appreciate you delineating the correct procedure I should follow to gain your Department's investigation and approval to market a new concept in Automobile Child Seating, for the 5-10 year old age group.

The G.T.A. Booster Cushion has performed excellently in both dynamic tests and real-life situations in Australia for the past 18 months, (see attached leaflet herewith, and product samples with Mr. V. G. Radovich), was designed primarily to raise children to see out the windows of an automobile, thus alleviating child stress and enabling everyone in the automobile to have a safer, comfortable and more enjoyable trip. The G.T.A. Booster Cushion can be used with the adult lap, lap sash seat belts or child harness restraints. The Booster Cushion raises the child virtually into the adult height position, where the design ensures the correct location of the adult seat belt restraint across the child's lap or in the case of lap sash, across the child's neck, chest and lap, therefore alleviating the danger of the buckle harming the child in those areas during a sudden impact or stop.

Additionally, the G.T.A. Booster Cushion has two notches, one located at either side where the back and base pieces are joined. These designed patented notches ensure that on a forward or rear impact, the lap section of the seat belt grips in these notches and stops any torpedoing action (as happens with regular household cushions) of either the child or the Booster Cushion.

The G.T.A. Booster Cushion is also extremely comfortable, lightweight and requires no installation. Sir, I would appreciate it if you would consider my request and advise direction at your earliest convenience.

Thank you.

Graham Budrodeen President

THE GTA BOOSTER CUSHION (Brochure 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.

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