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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 321 - 330 of 2067
Interpretations Date

ID: aiam4799

Open
Mr. William D. Rogers President SportsCar America, Inc. 400 South Elliott Road Chapel Hill, N.C. 27514; Mr. William D. Rogers President SportsCar America
Inc. 400 South Elliott Road Chapel Hill
N.C. 27514;

"Dear Mr. Rogers: We have received the (unsigned) petition of SportsCa America, Inc., for a temporary exemption from Motor Vehicle Safety Standard No. 208, on grounds of substantial economic hardship, and are returning all copies to you for the reasons stated below. SportsCar America wishes to undertake the importation and sale of passenger cars produced in Brazil. Pursuant to an 'Exclusive Distribution Agreement' ('the Agreement') with Alfa Metais Veiculos Ltda. of Brazil, which you enclosed, it has imported a prototype vehicle for study, with reference to its status of conformance with the U.S. vehicle safety and emission standards. The proper petitioner for this exemption is Alfa Metais Veiculos Ltda., identified in the Agreement that you attached as the 'Manufacturer.' Under Section l of the Agreement, SportsCar America is to return the prototype to the Manufacturer with 'those modifications necessary in order to meet the emission and safety standards necessary for the importation' of the cars, and the Manufacturer will then use it as a model for the production of vehicles for sale in the United States. Under 49 CFR Part 567, the Manufacturer must also attach its certification of compliance to the completed vehicle before its shipment to the United States. Part 555 restricts petitions for temporary exemptions to Manufacturers of motor vehicles. Although you identify SportsCar America as the 'distribution agent', we have no record that the Manufacturer has filed the designation of agent pursuant to 49 CFR 551.45 that is required of Manufacturers offering their products for importation and sale in the United States. Presumably Alfa Metais would wish to appoint SportsCar America as its agent. Once it has done so, SportsCar America may submit the petition on behalf of the Manufacturer. The production and financial data (in dollars, please) must be those of the Manufacturer. However, we regard as relevant to conformance arguments the efforts that SportsCar America intends to make during the time a possible exemption is in effect, as outlined in your petition. Noting your requests for confidential treatment of information, we are returning all copies of your petition, with our comments. Generally, the agency does not like to accord confidential treatment to all financial data submitted. At a minimum, it would like to include in its notice asking comments from the public a dollar amount of the cumulative net profit or loss experienced by the Manufacturer in the three years preceding the filing of the petition. Similarly, it would like to publish a dollar figure in discussing the effects of a denial of the petition on the petitioner. The purpose of this is our policy that if the public is to make an informed comment on the issue of whether compliance would cause a Manufacturer substantial economic hardship, the public should have access to much the same data as is available to the agency in its determination. If you would like clarification of any of these matters, Taylor Vinson of this Office (202-366-5263) will be happy to provide them. Sincerely, Paul Jackson Rice Chief Counsel Enclosures";

ID: aiam4255

Open
Mr. William Wallace, Assistant Manager, Chemical Commodities, New York City Transit Authority, 25 Jamaica Avenue, Brooklyn, NY 11207; Mr. William Wallace
Assistant Manager
Chemical Commodities
New York City Transit Authority
25 Jamaica Avenue
Brooklyn
NY 11207;

Dear Mr. Wallace: Thank you for your letter of June 19, 1985, concerning how ou regulations would affect the use of certain glazing materials in buses. You explained that the Transit Authority has recently contracted to have several hundred buses rehabilitated. As a part of that work, the side glazing of the buses was replaced with glazing that contained the following markings, 'Lexan, MR 5000 sheet, ANSI Z 26-1, Camplas, NY.'; Subsequent to receipt of your letter, we received additiona information from General Electric, the manufacturer of Lexan, concerning the glazing material used in the side windows of your buses. According to General Electric, the Lexan glazing material used in these windows can meet all of the performance requirements set in Standard No. 205 for 'AS-5' glazing materials. The glazing material apparently was not marked as 'AS-5' material. As discussed below, if the only markings on the glazing are the markings you described in your letter, the glazing apparently does not comply with the marking requirements of Standard No. 205, *Glazing Materials*.; Standard No. 205 specifies performance and location requirements fo glazing used in new vehicles and glazing sold as replacement equipment. (The various types of glazing are designated as 'items' in the standard.) Plastic glazing materials, such as Lexan, can be used in a number of different locations in a bus depending on which performance requirements the glazing meets. If the plastic glazing meets the requirements set for AS-5 glazing materials, it can be used in any window in a bus, except for the windshield, the windows to the immediate right and left of the driver, and the rearmost windows, if used for driving visibility.; In addition to setting performance requirements for different items o glazing, the standard requires glazing materials to contain certain markings. The marking requirements of S6 of the standard vary depending on the intended use of the glazing and the person that is marking the glazing. At a minimum, the standard requires the glazing to be marked with the AS number (which indicates that the material meets the performance requirements set for that 'item' of glazing material), a model number and the manufacturer's logo. The information you provided about the markings on the glazing installed in your buses indicates that the glazing does not have an AS number marked on it.; Any glazing sold for use in a motor vehicle must conform to th applicable requirements of Standard No. 205. Since there appears to be an apparent noncompliance, we have been in contact with General Electric to obtain further information about this possible noncompliance. Our regulations do not preclude the Transit Authority from operating a vehicle with noncomplying glazing materials, however, you should check with State authorities to determine the effect of New York law on operating these buses.; Thank you for bringing this matter to the attention of the agency. I you need further information, please let me know.; Sincerely, Erika Z. Jones, Chief Counsel

ID: aiam2324

Open
Mr. Jack Roadman, Box 9971, Pittsburgh, PA 15233; Mr. Jack Roadman
Box 9971
Pittsburgh
PA 15233;

Dear Mr. Roadman: This is in response to your letters of February 26 and March 8, 1976 concerning the certification of a truck that you wish to build with a chassis that you have purchased from International Harvester. You have indicated that the chassis did not include an engine, transmission, or radiator. You installed a diesel engine, transmission, and a new driveshaft, and made various modifications to the chassis. You have had difficulties in persuading a body manufacturer to install a truck body.; The source of your difficulties appears to be a misunderstanding of th requirements of the National Traffic and Motor Vehicle Safety Act of 1966 (the Act) and the accompanying certification regulations. Pursuant to the Act, the National Highway Traffic Safety Administration has issued Federal motor vehicle safety standards. These standards apply to completed motor vehicles and to certain items of motor vehicle equipment (e.g., brake hoses, tires). The manufacturer of a motor vehicle or an item of equipment to which a standard applies is required by Section 114 of the Act to certify that his product complies with all applicable Federal motor vehicle safety standards.; 'Incomplete vehicle' is defined in 49 CFR Part 568, *Vehicle Manufactured in Two or More Stages*, as:; >>>an assemblage consisting, as a minimum, of frame and chassi structure, power train, steering system, suspension system, and braking system, to the extent that those systems are to be part of the completed vehicle, that requires further manufacturing operations, other than the addition of readily attachable components, such as mirrors or tire and rim assemblies, or minor finishing operations such as painting, to become a completed vehicle.<<<; An incomplete vehicle is, strictly speaking, an item of motor vehicl equipment. There are no Federal motor vehicle safety standards that apply directly to these particular equipment items, and thus there is presently no certification requirement for incomplete vehicles. The manufacturer of an incomplete vehicle is required by Part 568, however, to furnish an 'incomplete vehicle document'. This document, which is described in S 568.4, must indicate the conformity status of the incomplete vehicle with respect to each standard that applies to the vehicles into which it may be completed.; The chassis that you bought from International Harvester (IH) was a item of motor vehicle equipment to which no standards apply. Therefore, IH was not required to furnish you with a certification of compliance. Further, the chassis was not an incomplete vehicle because it lacked an engine and transmission. Therefore, IH was not required to furnish an incomplete vehicle document. Becuase (sic) of your operations on the chassis, you are the manufacturer of an incomplete vehicle. You, therefore, are the person required to furnish an incomplete vehicle document.; Your letter also indicated a concern thay (sic) you were not given 'certificate of origin' by International Harvester when you purchased the chassis. Federal law does not require the issuance of a certificate of origin. Unless you intended to refer to the Section 114 'certification' discussed above, I assume that you have in mind a document that would be the subject of Pennsylvania state law.; Copies of the Act and the certification regulations are enclosed fo your convenience.; Yours truly, Stephen P. Wood, Assistant Chief Counsel

ID: aiam4269

Open
Mr. Bruce Torrey, Product Performance Specialist, General Electric Company, One Plastic Avenue, Pittsfield, MA 01201; Mr. Bruce Torrey
Product Performance Specialist
General Electric Company
One Plastic Avenue
Pittsfield
MA 01201;

Dear Mr. Torrey: Thank you for your letters of August 13, and 26, 1986, concerning ho the requirements of Standard No. 205, *Glazing Materials*, apply to glazing materials installed in the side windows of some New York City Transit Authority (NYCTA) buses. As explained below, the information you provided in your letters and in your phone conversations with Stephen Oesch of my staff and the information provided by NYCTA in a June 19, 1986 letter to the agency indicates the glazing materials installed in the NYCTA buses do not comply with the marking requirements of the standard.; You explained in your letter that the glazing material used in the sid and standee windows in the buses is Lexan sheet, which is a plastic material manufactured by General Electric. According to your letter the Lexan glazing material used in these windows can meet all of the performance requirements set in Standard No. 205 for 'AS-5' glazing materials. However, the material apparently was not marked as 'AS-5' material, but may have instead been marked 'AS-4/6.' (Information provided to the agency by the NYCTA in June 1986 indicates that the windows did not contain any 'AS' number. At the time of your phone conversation with Mr. Oesch, you had not been able to confirm what markings, if any, had been placed on the glazing material by General Electric).; Standard No. 205 specifies performance and location requirement fo glazing used in new vehicles and glazing sold as replacement equipment. (The various types of glazing are designated as 'items' in the standard). Plastic glazing materials, such as Lexan, can be used in a number of different locations in a bus depending on which performance requirements the glazing meets. If the plastic glazing meets the requirements set AS-5 glazing materials, it can be used in any window in a bus, except for the windshield, windows to the immediate right and left of the driver and the rearmost windows if used for driving visibility.; In addition to setting performance requirements for different items o glazing, the standard requires glazing materials to contain certain markings. The marking requirements of S6 of the standard vary depending on the intended use of the glazing and the person that is marking the glazing. At a minimum, the standard requires the glazing to be marked with the AS number (which indicates that the material meets the performance requirements set for that 'item' of glazing material), a model number and the manufacturer's logo. The information the agency has received about the markings on the glazing installed in the NYCTA buses indicates that the glazing does not have an AS number marked on it.; Any glazing sold for use in a motor vehicle must conform to th applicable requirements of Standard No. 205. Since there appears to be an apparent noncompliance, General Electric is required by Part 575 of our regulations to file a report with the agency providing additional details about the noncompliance and General Electric's plans to remedy the noncompliance. As you requested Mr. Oesch, I am also enclosing a copy of the agency's regulation concerning the filing of a petition for a determination that a noncompliance is inconsequential.; If you have any further questions, please let me know. Sincerely, Erika Z. Jones, Chief Counsel

ID: aiam5619

Open
The Honorable Bart Stupak U.S. House of Representatives 902 Ludington St. Escanaba, MI 49829; The Honorable Bart Stupak U.S. House of Representatives 902 Ludington St. Escanaba
MI 49829;

Dear Mr. Stupak: Thank you for your letter enclosing correspondenc from your constituent, Mr. Kurt B. Ries, concerning our requirements for school vehicles. Your letter was referred to the National Highway Traffic Safety Administration (NHTSA) for reply, since NHTSA regulates the manufacture of all vehicles, including vans and school buses. Mr. Ries, Director of the Northeast Michigan Consortium, asks for relief from what he believes is a new Federal regulation. The Northeast Michigan Consortium uses a number of 15-passenger vans to transport students to employment training programs and jobs. Mr. Ries believes the new Federal regulation will require all vehicles transporting students, including vans, to be replaced with 'mini-school buses,' which he believes is economically unfeasible. I appreciate this opportunity to address your constituent's concerns. As explained below, the new regulation that Mr. Ries is concerned about is not a Federal regulation, but one that Michigan is considering adopting as State law. NHTSA has issued safety standards applicable to new motor vehicles, including school buses. Under our regulations, a 'school bus' is a vehicle carrying 11 or more persons, that is sold to transport children to school or school-related events. Congress has directed NHTSA to require school bus manufacturers to meet safety standards on aspects of school bus safety, including floor strength, seating systems, and crashworthiness. Each seller of a new school bus must ensure that the vehicle is certified as meeting these safety standards. While NHTSA regulates the manufacture and sale of new school buses, this agency does not regulate the use of vehicles. Thus, we do not have a present or pending requirement that would require Mr. Ries to cease using his vans for school transportation. The requirements for the use of school buses and other vehicles are matters for each State to decide. We understand from Mr. Roger Lynas, the State Pupil Transportation Director in Michigan, that Michigan is considering changing its school bus definition to make it more similar to NHTSA's. Such an amendment could affect what vehicles can be used for school transportation under State law. For more information about Michigan's proposed amendment, we suggest Mr. Ries contact Mr. Lynas at (517) 373-4013. NHTSA does not require States to permit only the use of 'school buses' when buses are used for school transportation. However, we support State decisions to do so. NHTSA provides recommendations for the States on various operational aspects of school bus and pupil transportation safety programs, in the form of Highway Safety Program Guideline No. 17, 'Pupil Transportation Safety,' copy enclosed. Since school buses have special safety features that conventional buses do not have, such as padded, high-backed seats, protected fuel tanks, and warning lights and stop arms, they are the safest means to transport school children. Guideline 17 recommends that all buses regularly used for student transportation meet our school bus safety standards. I hope this information is helpful. If you have any further questions, please do not hesitate to contact me. Sincerely, Carol Stroebel Director of Intergovernmental Affairs Enclosure;

ID: aiam4770

Open
Mr. Samuel Kimmelman Engineering Product Manager Ideal Division EPICOR Industries, Inc. 3200 Parker Drive St. Augustine, FL 32084-0891; Mr. Samuel Kimmelman Engineering Product Manager Ideal Division EPICOR Industries
Inc. 3200 Parker Drive St. Augustine
FL 32084-0891;

Dear Mr. Kimmelman: This is in reply to your letter of August 2, l990 with respect to Motor Vehicle Safety Standard No. 108. It is your understanding that, when a vehicle is delivered to its purchaser with dealer-installed trailer hitch and associated wiring, it must conform to all applicable Federal motor vehicle safety standards. You interpret the standards as requiring three specific aspects of performance, and you ask whether we agree with those interpretations. These aspects are: 'l. The turn signal flasher must be certified as meeting the FMVSS-108 requirements of a variable load turn signal flasher, over a minimum load equal to that of the vehicle turn signal load and a maximum load equal to that of the vehicle plus the trailer.' This is essentially correct. However, it is not the flasher that is certified but the vehicle in which the flasher is installed, Standard No. 108 does not require certification of original equipment lighting items, only replacement equipment items. Standard No. 108's requirements for turn signal flashers are those of SAE Standard J590b, Automotive Turn Signal Flasher, October l965, which are incorporated by reference. Under the Standard's Scope, the flashers 'are intended to operate at the design load for the turn signal system as stated by the manufacturer.' If a vehicle is designed for towing purposes, and its manufacturer offers an optional trailer hitch and associated wiring, then that manufacturer must equip the vehicle with a flasher capable of meeting a minimum load equal to that of the vehicle turn signal load, and a maximum load equal to that of the vehicle plus the trailer. That will be a variable load turn signal flasher. The manufacturer of the vehicle is the person responsible for ensuring that the flasher meets the vehicle's design load requirements, and that the vehicle is certified as conforming to Standard No. 108. '2. The hazard warning signal flasher must be certified as meeting the requirements of FMVSS-108 over a load range of 2 lamps to the combined hazard warning loads of the vehicle plus the trailer.' This is also essentially correct, and our comments are similar. Standard No. 108's requirements for hazard warning signal flashers are those of SAE Recommended Practice J945 Vehicular Hazard Warning Signal Flasher, February l966, which are incorporated by reference. The Practice's Scope specifies that the flashers 'are required to operate from two signal lamps to the maximum design load . . . as stated by the manufacturer.' Thus, in order for the vehicle manufacturer to certify compliance with Standard No. 108, it must equip the vehic1e with a flasher that operates over a load range of two lamps to the total hazard warning system load of the vehicle plus the trailer. '3. The requirement to provide turn signal outage is voided due to the trailer towing capability of the vehicle.' This is correct. Under section S5.5.6 of Standard No. 108, any vehicle equipped to tow trailers and which uses a variable-load turn signal flasher is exempted from the failure indication requirements of the SAE standards on turn signals. I hope that this answers your questions. Sincerely, Paul Jackson Rice Chief Counsel;

ID: aiam5295

Open
Cheryl Graham, District Manager Northeast Region ARI P.O. Box 5039 Mt. Laurel, NJ 08054; Cheryl Graham
District Manager Northeast Region ARI P.O. Box 5039 Mt. Laurel
NJ 08054;

"Dear Ms. Graham: We have received your letter of November 10, 1993 asking about the permissibility of aftermarket installation of an auxiliary pair of stop lamps 'at each side of the rear window.' By way of background information the National Highway Traffic Safety Administration (NHTSA) issues Federal motor vehicle safety standards under the authority of the National Traffic and Motor Vehicle Safety Act (Safety Act). Under that Act, the sole restraint upon modifications to vehicles in use is that, if performed by a manufacturer, distributor, dealer, or motor vehicle repair business, the modifications must not 'knowingly render inoperative, in whole or in part, any device or element of design installed on . . . a motor vehicle in compliance with an applicable Federal motor vehicle safety standard . . . .' (15 U.S.C. 1397(a)(2)(A)). In NHTSA's view, if the modifications tend to impair the safety effectiveness of the 'device or element of design', then, at the minimum, a partial inoperability may have occurred within the meaning of the statutory prohibition. The question raised by your letter, therefore, is whether the installation of the auxiliary stop lamps in that location would impair the effectiveness of the three original equipment stop lamps. NHTSA decided to require the center highmounted stop lamp in addition to the then-existing original equipment two-lamp stop lamp system following research which indicated that a three-lamp system of this configuration was demonstrably more effective in preventing rear end crashes than other rear end lighting systems that were tested, and considerably lower in cost. Included in the testing was a four-lamp system which incorporated two lamps at each side of the rear window, but no tests were conducted on the five-lamp system you describe. The reasons for the better performance of the three-lamp system are unclear, but the triangular lighting array proved to be more effective than the trapezoidal four-lamp system (and more effective than a system tested which separated the usual stop lamp from the taillamp). Your customer appears to believe that the ability of following drivers to avoid rear end crashes is enhanced by a five-lamp stop lamp system. On the other hand, your proposed system, by incorporating the two lamps at each side of the rear window, would appear to change the lighting array. We cannot say that the five-lamp system would either enhance or detract from safety. Thus, we cannot find that the additional lamps would 'render inoperative' the original equipment three-lamp system, and it would be permissible under the regulations of this agency. However, the permissibility of such a modification would be determinable under State law. We are unable to advise you on the laws of the various States and suggest that you write the American Association of Motor Vehicle Administrators for an interpretation. Its address is 4600 Wilson Boulevard, Arlington, VA 22203. You have also asked 'if the work is done improperly and results in an accident, where does the liability lie?' This question is a matter of state law, and we suggest that you consult a local attorney concerning it. Sincerely, John Womack Acting Chief Counsel";

ID: aiam5489

Open
Mr. G. Brandt Taylor President Day-Night Mirrors, Inc. 36 Barnes Hill Road Berlin, MA 01503; Mr. G. Brandt Taylor President Day-Night Mirrors
Inc. 36 Barnes Hill Road Berlin
MA 01503;

Dear Mr. Taylor: This responds to your letter asking about th requirements applicable to multiple reflectance mirrors in Federal Motor Vehicle Safety Standard (FMVSS) No. 111, Rear View Mirrors. You stated that your mirror can change its reflectivity either by mechanically rotating a shaft or by actuating an electrical motor. By way of background information, the National Highway Traffic Safety Administration (NHTSA) has the authority to issue safety standards for new motor vehicles and new items of motor vehicle equipment. NHTSA does not, however, approve or certify any vehicles or items of equipment. Instead, each manufacturer is responsible for 'self-certifying' that its products meet all applicable safety standards. The agency periodically tests vehicles and items of equipment for compliance with the standards. FMVSS No. 111 specifies requirements for the performance and location of rearview mirrors. Section S11, which specifies requirements for mirror construction, provides in relevant part that All single reflectance mirrors shall have an average reflectance of at least 35 percent. If a mirror is capable of multiple reflectance levels, the minimum reflectance level in the day mode shall be at least 35 percent and the minimum reflectance level in the night mode shall be at least 4 percent. A multiple reflectance mirror shall either be equipped with a means for the driver to adjust the mirror to a reflectance level of at least 35 percent in the event of electrical failure, or achieve such reflectance automatically in the event of electrical failure. You asked several questions about the requirement for adjusting the mirror in the event of electrical failure. You first asked if a manual override knob could be removable. You then asked whether a removable manual override could be supplied by the car manufacturer along with the car keys or with the owner's manual for insertion into the mirror and use only in the event of an electrical failure. You also asked about whether 'west coast' mirrors and mirrors on trailer trucks could have a removable manual override. The answer to each of your questions is that a removable manual override knob would not be permitted. In the preamble to the final rule amending the mirror construction requirements in FMVSS No. 111, NHTSA stated that the agency's goal is to assure that multiple reflectance mirrors are capable of providing adequate images at all times during the vehicle's operation, including electrical failure situations where the mirror is unpowered. (see 56 FR 58513, November 20, 1991) The manual override knob you discuss would serve as the means for the driver to adjust the mirror's reflectance level. However, a removable manual override knob would not always serve this purpose, since it would not necessarily always be with the mirror. We are concerned that a removable override device may become lost or otherwise not available when a mirror's reflectance needs to be adjusted. Accordingly, since the agency's goal of providing adequate images at all times during the vehicle's operation would only be achieved by requiring this device to be permanent, a removable override would not be permitted. I hope this information is helpful. If you have any other questions, please contact Marvin Shaw of my staff at this address or by phone at (202) 366-2992. Sincerely, Philip R. Recht Chief Counsel;

ID: nht72-3.18

Open

DATE: 05/31/72

FROM: AUTHOR UNAVAILABLE; Richard B. Dyson; NHTSA

TO: GO Industries

TITLE: FMVSS INTERPRETATION

TEXT: This is in reply to your letter of April 26, 1972, requesting an opinion as to whether "Abcite," a product of the Dupont Company, may be used in campers and "mini-mobile homes."

Whether a particular glazing material may be used in motor vehicles or campers depends upon whether the material meets the requirements of Motor Vehicle Safety Standard No. 205, "Glazing Materials" (49 CFR 571.205), which incorporates, as you indicate, the American National Standards Institute Standard Z26.1-1966. That standard also specifies the locations in motor vehicles where specific materials may be used.

Standard No. 205 does not apply to trailers. While we are not familiar with the phrase "mini-mobile home," we consider mobile homes to be trailers, and the standard does not apply to them. With respect to campers, Standard No. 205 allows the use of any material meeting the requirements of Z26 in any location except for forward-facing windows. Forward-facing camper windows may not be manufactured of item 6 and item 7 material (AS6, AS7), but may be manufactured of any of the other materials (AS1-AS5, AS8-AS11) that meets the requirements of Z26.

Whether Abcite conforms to the requirements for glazing allowed to be used in campers is a determination that should be made in the first instance by its manufacturer, Dupont. If the manufacturer determines that such use is within the requirements of Standard No. 205, he is required by section 114 of the National Traffic and Motor Vehicle Safety Act to certify that the material conforms to the requirements of the standard. He is also required by the marking requirements in Section 6 of Z26.1-1966 to indicate on the material its AS designation. Any material that is so certified can be used in the camper locations listed on the standard as appropriate for that designated type.

ID: nht95-2.99

Open

TYPE: INTERPRETATION-NHTSA

DATE: May 31, 1995

FROM: John C. Golden -- Product Manager, Lighting and Electrical, Federal Mogul Corp.

TO: John Womack -- Acting Chief Counsel, U.S. DOT

TITLE: NONE

ATTACHMT: ATTACHED TO 10/16/95 LETTER FROM JOHN WOMACK TO JOHN C. GOLDEN (A43; VSA 108(a)(2)(A); STD. 125)

TEXT: Dear Mr. Womack,

We are seeking some clarification on F.M.V.S.S. 125 and how it relates to a letter you wrote Mr. John G. Klinge, Executive Vice President, Visibility Systems Company dated 12 August, 1994.

We market a wide variety of lighting and safety devices under the brand name Signal-State. Mr. Klinge provided us a copy of your written response to his inquiry before we chose to go ahead and market his product under our name.

Now, Mr. Klinge would like us to market a three-pack version of his battery operated safety strobe device (an equilateral triangle measuring 3 1/2" on each side) that is, in our opinion, specifically designed for use on DOT warning triangles. We think i t is a terrific idea. However, before we market this item we have one question:

The requirement for warning triangles is for 17" (minimum) leg length and 2" (minimum) leg width. The red reflector must be 1/2" (minimum) width. Does the mounting of one of these devices (as pictured, attached) take away minimum reflective area suc h that it would render the warning triangles illegal or ineffective?

Our greatest fear is the possibility of a motorist coming over a hill on a dark night . . . and over that hill is a broken down vehicle . . . with triangles properly deployed . . . but with a Lightman on top of each . . . with dead batteries.

If you think we should contact the Federal Highway Administration for clarification, please be kind enough to direct me to the proper person.

(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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