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
| Interpretations | Date |
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ID: aiam3670OpenMr. Robert P. Eschino, Vice President, Gold Bug, 2151 West 57th Avenue, Denver, CO 80221; Mr. Robert P. Eschino Vice President Gold Bug 2151 West 57th Avenue Denver CO 80221; Dear Mr. Eschino: This responds to your February 9, 1983, letter asking about th compliance of a device that you manufacture with Federal motor vehicle safety standards. The device is a head support for children which has several uses, one of which would be in a car seat. You specifically ask to obtain the Federal seal for use on your package.; Only those items of equipment to which specific Federal safet standards apply are marked with the DOT symbol which indicates that they are in compliance with applicable safety standards. From our analysis of your product, it is not a piece of equipment subject to any Federal motor vehicle safety standard. Since your device does not need to comply with any of our requirements, you would not need, nor would you be permitted to use, the DOT symbol.; We would recommend, however, from a product liability point of vie that you ensure that your product complies with flammability requirements. I am enclosing a copy of our flammability standard that you might use as a guideline, although as I stated earlier, you would not be required to comply with this standard.; Sincerely, Frank Berndt, Chief Counsel |
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ID: aiam1911OpenMr. Ivan J. Wagar, President, Safety Helmet Council of America, 9841 Airport Boulevard, Suite 1208, Los Angeles, CA 90045; Mr. Ivan J. Wagar President Safety Helmet Council of America 9841 Airport Boulevard Suite 1208 Los Angeles CA 90045; Dear Ivan: This is in response to your recent letter requesting clarification o two points concerning motorcycle helmet dealers' responsibilities under Standard 218.; You ask first about the penalties which would apply to 'dealers wh knowingly sell non DOT labeled helmets for on-road use.' Section 108 of the National Traffic and Motor Vehicle Safety Act (15 U.S.C. 1397) reads in pertinent part:; >>>'No person shall...sell, offer for sale, or introduce or deliver fo introduction into interstate commerce, or import into the United States any motor vehicle or item of motor vehicle equipment manufactured on or after the date any applicable Federal motor vehicle safety standard takes effect under this subchapter unless it is in conformity with such standard ...'<<<; Section 109 of the Act (15 U.S.C. 1398) provides for civil penalties o up to $1000 for each violation, up to a maximum of $800,000 for any related series of violations. Each sale or offer for sale constitutes a separate violation of the Act.; As you know, Standard 218 applies only to helmets fitting the size headform and manufactured after February 28, 1974. Thus, dealers may continue to sell size C helmets manufactured before March 1, 1974. We have taken the position that any helmets designed to fit a range of head sizes that includes the approximate dimensions of the size C headform must meet the requirements of Standard 218. A helmet is considered not to fit a size C headform only if it is clearly intended by its manufacturer to be used only by persons whose heads are either larger or smaller than the size C headform.; With regard to racing or other off-road helmets we have taken th position that such helmets must be clearly and prominently labeled as not for use on public highways. The following label was considered acceptable:; >>>IMPORTANT: THIS HELMET IS MANUFACTURED FOR RACING AND SIMILA OFF-ROAD SPORTS ONLY, AND IS NOT REGULATED BY THE U.S. DEPARTMENT OF TRANSPORTATION. IT IS NOT FOR USE ON PUBLIC STREETS, ROADS AND HIGHWAYS.<<<; You ask further whether helmet manufacturers must keep records of firs purchasers. The answer is no. NHTSA believes that keeping such records is a sound business practice which is generally necessary in connection with a responsible warranty program, but this agency presently requires such recordkeeping only by motor vehicle and tire manufacturers, not by equipment manufacturers.; I enclose a copy of the Act which incorporates the 1974 amendments. I I can be of further assistance in your worthwhile and much needed educational program please let me know.; Yours truly, Richard B. Dyson, Assistant Chief Counsel |
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ID: aiam1908OpenMr. Ivan J. Wagar, President, Safety Helmet Council of America, 9841 Airport Boulevard, Suite 1208, Los Angeles, CA 90045; Mr. Ivan J. Wagar President Safety Helmet Council of America 9841 Airport Boulevard Suite 1208 Los Angeles CA 90045; Dear Ivan: This is in response to your recent letter requesting clarification o two points concerning motorcycle helmet dealers' responsibilities under Standard 218.; You ask first about the penalties which would apply to 'dealers wh knowingly sell non DOT labeled helmets for on-road use.' Section 108 of the National Traffic and Motor Vehicle Safety Act (15 U.S.C. 1397) reads in pertinent part:; >>>'No person shall...sell, offer for sale, or introduce or deliver fo introduction into interstate commerce, or import into the United States any motor vehicle or item of motor vehicle equipment manufactured on or after the date any applicable Federal motor vehicle safety standard takes effect under this subchapter unless it is in conformity with such standard ...'<<<; Section 109 of the Act (15 U.S.C. 1398) provides for civil penalties o up to $1000 for each violation, up to a maximum of $800,000 for any related series of violations. Each sale or offer for sale constitutes a separate violation of the Act.; As you know, Standard 218 applies only to helmets fitting the size headform and manufactured after February 28, 1974. Thus, dealers may continue to sell size C helmets manufactured before March 1, 1974. We have taken the position that any helmets designed to fit a range of head sizes that includes the approximate dimensions of the size C headform must meet the requirements of Standard 218. A helmet is considered not to fit a size C headform only if it is clearly intended by its manufacturer to be used only by persons whose heads are either larger or smaller than the size C headform.; With regard to racing or other off-road helmets we have taken th position that such helmets must be clearly and prominently labeled as not for use on public highways. The following label was considered acceptable:; >>>IMPORTANT: THIS HELMET IS MANUFACTURED FOR RACING AND SIMILA OFF-ROAD SPORTS ONLY, AND IS NOT REGULATED BY THE U.S. DEPARTMENT OF TRANSPORTATION. IT IS NOT FOR USE ON PUBLIC STREETS, ROADS AND HIGHWAYS.<<<; You ask further whether helmet manufacturers must keep records of firs purchasers. The answer is no. NHTSA believes that keeping such records is a sound business practice which is generally necessary in connection with a responsible warranty program, but this agency presently requires such recordkeeping only by motor vehicle and tire manufacturers, not by equipment manufacturers.; I enclose a copy of the Act which incorporates the 1974 amendments. I I can be of further assistance in your worthwhile and much needed educational program please let me know.; Yours truly, Richard B. Dyson, Assistant Chief Counsel |
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ID: nht87-2.62OpenTYPE: INTERPRETATION-NHTSA DATE: 08/03/87 FROM: ERIKA Z. JONES -- CHIEF COUNSEL NHTSA TO: DOUGLAS H. BOSCO -- HOUSE OF REPRESENTATIVES TITLE: NONE ATTACHMT: ATTACHED TO LETTER DATED 08/19/88 TO DOUGLAS H BOSCO, FROM ERIKA Z JONES, REDBOOK A32 (2) STANDARD 108; LETTER DATED 06/16/88, TO ERIKA Z. JONES, FROM DOUGLAS H. BOSCO; LETTER DATED 06/09/88 TO JERRY K YOST FROM L.F ROLLIN; LETTER DATED 03/28/8 8 TO C-MORE-LITE JERRYS SERVICE FROM DON O. HORNING RE TEST REPORT NO 92606; 1988 LETTER TO ERIKA JONES FROM JERRY'S SERVICE TEXT: Dear Mr. Bosco: This is in reply to your recent letter on behalf of your constituent, Jerry Yost. Mr. Yost would like to know of the permissibility under Federal regulations of a headlamp relay which would allow a headlamp's lower beam to remain in operation when the u pper beam is activated. You enclosed some diagrams from Mr. Yost and asked for confirmation of his assessment that they would demonstrate that "the candela criterion in the existing regulations for high-beam" would be met "when low and high-beam are com bined." Federal Motor Vehicle Safety Standard No. 108, Lamps, Reflective Devices, and Associated Equipment, is the regulation governing the permissibility of relays allowing simultaneous operation of upper and lower beams on motor vehicle headlamps. The standar d specifies requirements for two generic types of headlamps, sealed beam (an indivisible unit encompassing the reflector, lens, and light source), and replaceable bulb (the replaceable in the event of burn out). Eight different types of sealed beam head lamps are permitted (denominated Types A through H), and three types of replaceable bulbs (He1, HB3, and HB4). However, in only one of the sealed beam systems is simultaneous operation of upper and lower beam specifically permitted, the Type F system (pa ragraph S4.5.12). Simultaneous beam operation is also permitted in replaceable bulb headlighting systems comprising four headlamps designed to conform to Type F photometry (S4.5.8, with Type F photometrics at Figure 15). Simultaneous operation of both beams is not a required feature of any of these systems but an option available to vehicle manufacturers. Thus, Mr. Yost's relay is permissible in any of these systems employing the simultaneous activation option. However, simultaneous activation of both beams is explicitly prohibited in headlighting systems consisting of four replaceable bulb lamps designed to meet photometrics other than those of Type F (S4.5.8), and implicitly prohibited under the agency's inte rpretations of materials of the Society of Automotive Engineers relating to means of switching beams that are incorporated by reference into Standard No. 108. These materials refer to operation of separate beams with no reference to joint operation. As I discussed with your Administrative Assistant, Mitch Stogner, the agency's principal historic concern with simultaneous 2 activation of lower and upper headlamp beams is that the maximum candlepower limitations established by the Federal vehicle lighting standard could be exceeded. These limitations are set forth in SAE Standard J579c, the photometric requirements applic able to all headlighting systems except those designed to meet Type F photometry. These photometrics were intentionally adopted to allow simultaneous activation without exceeding the overall candlepower limit deemed desirable for motor vehicle safety. Based upon its research, the agency has concluded that frontal lighting on motor vehicles should not exceed 150,000 candela when the lamps are activated. In addition, the Type F. photometrics establish maximum values for two lower beam test points in o rder to reduce the possibility of excessive foreground light and glare resulting from simultaneous use. The diagrams that Mr. Yost provided describe the installation and operation of the relay, measurement of 7" circular headlamps (Type D under Standard No. 108) with a mechanical aimer, and how various types of headlighting systems look on the front of cars. While we appreciate having the benefit of this information, only that pertaining to the design of the relay is relevant to permissibility of use with systems designed to meet Type F photometrics. As Standard No. 108 does not specify the design of relay switches, Mr. Yost should be encouraged to contact motor vehicle manufacturers who may be interested in using headlighting systems designed to meet Type F photometrics with the option of simultaneo us activation of both beams. The agency has no present plan to modify Standard No. 108 to allow simultaneous use with any system employing photometrics other than Type F and, as indicated earlier, considers this a prohibited practice with other systems. I hope that this information is useful to you. Sincerely, |
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ID: aiam0034OpenHonorable Bob Wilson, House of Representatives, Washington, DC, 20515; Honorable Bob Wilson House of Representatives Washington DC 20515; Dear Mr. Wilson: This is in response to your letter of August 16 in which you attached letter from your constituent, Mrs. Beverly Hoffman of San Diego. Mrs. Hoffman asked if there is any Federal or state regulation, or city ordinance, which forbids the removal or concealment of passenger seat belts in taxicabs. Mrs. Hoffman has raised an important question and one which is of vital concern to the objectives of the National Traffic and Motor Vehicle Safety Act of 1966: the retention of a (sic) safety equipment in a vehicle after its original purchase.; Since I expect that California law is of most interest to both Mrs Hoffman and you, I will answer her question on the basis of the California Vehicle Code. Since January 1, 1964, Section 27309 has made it an offense to sell in California any new passenger vehicle which does not have at least two state approved restraint belts or harnesses in its front seat. Retention of the front seat belts by the vehicle owner is indirectly required by Section 40001(b)(2) which makes it unlawful for 'an owner to request, cause, or permit the operation of any vehicle which is not *equipped as required in this Code*.' (emphasis supplied) Since California has no annual motor vehicle inspection, enforcement of this law has presumably been by spot inspection. Members of the California Highway Patrol (Section 2804) and city traffic officers (Section 2806) have the authority to inspect a vehicle to determine whether its equipment is in compliance with the Code.; With respect to rear seat belts which most directly concern Mrs Hoffman as a passenger, their installation has not been required by the Code. Such belts as she may have seen in the rear of California taxis have been provided as a courtesy of the owner rather than as a requirement of the law. But, as she correctly notes, all passenger cars including taxicabs manufactured on or after January 1, 1968, must comply with Federal motor vehicle safety standards. One of these, Standard No. 208, will require taxis to be manufactured with lap restraint belts installed in each rear seating position. But if the California legislature has not amended the Vehicle Code itself to require their installation it would appear that there is no legal reason why a cab owner may not remove rear seat belts should he wish to go to the trouble.; Under the Act, the Secretary of Transportation does not have th authority to directly regulate motor vehicles 'after the first purchase of it in good faith for purposes other than resale.' Instead, Congress intended that used vehicles be regulated by periodic state inspection. To implement this intent the Secretary has been directed to study state inspection systems and, in due course, to establish uniform standards applicable to all used motor vehicles. A hypothetical standard--and one which we shall consider--requiring the presence of original equipment safety items at time of each inspection would be sufficient to cover retention of rear seat safety belts. But the Act establishes no requirement that the states or any individual follow any used vehicle standard. For the probably enforcement mechanism of used car standards it is necessary to turn to the companion Highway Safety Act of 1966. Under this Act each state is required to have a highway safety program in accordance with standards promulgated by the Secretary. One such standard, already issued, establishes minimum requirements for periodic motor vehicle inspection. Eventually it is possible that used car standards will be suggested to the states through this motor vehicle inspection standard, but enforcement of the used car standards will be left to the states.; Concerning concealment of the belts, I am aware of no legislation Federal, state, or municipal, which requires that a safety item not only be retained but also available for use. But I believe that sufficient authority may exist in the Highway Safety Act's mandate to the Bureau to include 'vehicle operation' in the highway safety program standards to warrant our serious consideration of it.; I hope that this has answered Mrs. Hoffman's questions and I appreciat her interest in traffic safety.; Sincerely, William Haddon, Jr., M. D., Director |
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ID: aiam0496OpenMr. Ed Baringer, Manager, Penn-Ohio Chapter, 25 East Boardman Street, Youngstown, OH 44503; Mr. Ed Baringer Manager Penn-Ohio Chapter 25 East Boardman Street Youngstown OH 44503; Dear Mr. Baringer: In your letter of November 23, 1971, you asked how your members coul make sure that the seat belts they install in their trucks conform to the applicable motor vehicle safety standards. As far as the belts themselves are concerned, each belt made after the seat belt standard (No. 209) became effective in 1967 is required to (sic) marked with the year of manufacture. So long as the belt bears a date after 1967, it will have had to conform to the seat belt standard and your members should use the date as a guide in purchasing belts.; The provision of anchorages for the belts is a somewhat more comple problem. A new truck - manufactured after July 1, 1971 - is required to have anchorages for lap belts at all seating positions (and, in some cases, anchorages for shoulder belts). Although older trucks were sometimes provided with anchorages, many were not, and for these you will have to follow the location and instructions of Standard No. 210 in order to comply with the Motor Carrier Safety Regulations. Although the Motor Carrier Safety Regulations do not establish strength requirements for anchorages, their strength should be of concern to you and in this area you may have to rely on the manufacturer, rather than the dealer, for advice on reinforcement of the vehicle structure.; Our legal staff is centralized in Washington and there are no fiel representatives of the agency who could assist you in matters relating to the standards. As much as we would like to send someone to address your group, the workload of the upcoming months prevents such a trip. However, we have found that many questions can be satisfactorily answered by letter. If your group could assemble a detailed list of questions, we will try to answer them as fully as possible.; Sincerely, Richard B. Dyson, Assistant Chief Counsel |
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ID: aiam0495OpenMr. Ed Baringer, Manager, Penn-Ohio Chapter, 25 East Boardman Street, Youngstown, OH 44503; Mr. Ed Baringer Manager Penn-Ohio Chapter 25 East Boardman Street Youngstown OH 44503; Dear Mr. Baringer: In your letter of November 23, 1971, you asked how your members coul make sure that the seat belts they install in their trucks conform to the applicable motor vehicle safety standards. As far as the belts themselves are concerned, each belt made after the seat belt standard (No. 209) became effective in 1967 is required to (sic) marked with the year of manufacture. So long as the belt bears a date after 1967, it will have had to conform to the seat belt standard and your members should use the date as a guide in purchasing belts.; The provision of anchorages for the belts is a somewhat more comple problem. A new truck - manufactured after July 1, 1971 -is required to have anchorages for lap belts at all seating positions (and, in some cases, anchorages for shoulder belts). Although older trucks were sometimes provided with anchorages, many were not, and for these you will have to follow the location and instructions of Standard No. 210 in order to comply with the Motor Carrier Safety Regulations. Although the Motor Carrier Safety Regulations do not establish strength requirements for anchorages, their strength should be of concern to you and in this area you may have to rely on the manufacturer, rather than the dealer, for advice on reinforcement of the vehicle structure.; Our legal staff is centralized in Washington and there are no fiel representatives of the agency who could assist you in matters relating to the standards. As much as we would like to send someone to address your group, the workload of the upcoming months prevents such a trip. However, we have found that many questions can be satisfactorily answered by letter. If your group could assemble a detailed list of questions, we will try to answer them as fully as possible.; Sincerely, Richard B. Dyson, Assistant Chief Counsel |
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ID: aiam2656OpenMr. Charles E. Klatt, Senior Director, Codes, Legalities, Testing & Training, Holiday Rambler Corporation, 65528 St. Road 19, Wakarusa, IN 46573; Mr. Charles E. Klatt Senior Director Codes Legalities Testing & Training Holiday Rambler Corporation 65528 St. Road 19 Wakarusa IN 46573; Dear Mr. Klatt: This responds to your June 1, 1977, letter asking several question about the applicability of Federal safety standards to travel and motor homes.; You first ask whether bed sheets and decorative bedspreads shipped wit a motor home are required to meet Standard No. 302, *Flammability of Interior Materials*. The items required to meet the standard are listed in S4.1 of the standard. That list does not include sheets or bedspreads. Therefore, they are not required to comply with the standard.; In a related question pertaining to Standard No. 302, you ask whethe 'mattress cover' as that term is used in the standard refers to the permanent mattress ticking or to a removable mattress cover. The National Highway Traffic Safety Administration (NHTSA) has determined that the standard applies to both the permanent ticking and the removable cover. Therefore, both must comply with the requirements of Standard No. 302.; In a question pertaining to Standard No. 207, *Seating Systems*, yo ask whether it is permissible to label a bench seat 'not for occupancy while vehicle is in motion' on one label or whether a seat must be labeled at each seating position. Standard No. 207 requires only one label for a bench seat in a motor home. You should note that Standard No. 207 does not apply to travel trailers.; You ask whether the NHTSA has jurisdiction over safety-related defect in motor homes not covered by safety standards. The agency has general defect jurisdiction granted by the National Traffic and Motor Vehicle Safety Act (15 U.S.C. 1381 *et seq*.) for all safety-related motor vehicle defects. The NHTSA's defect jurisdiction also extends to the nonoperational safety of a vehicle.; In a final question you ask whether the agency has jurisdiction ove 'any motor vehicle' which is defined in the Act as 'any vehicle driven or drawn by mechanical power...' Therefore, the NHTSA has jurisdiction over travel trailers that is identical to its jurisdiction over any other motor vehicle.; Sincerely, Joseph J. Levin, Jr., Chief Counsel |
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ID: aiam2657OpenMr. Charles E. Klatt, Senior Director, Codes, Legalities, Testing & Training, Holiday Rambler Corporation, 65528 St. Road 19, Wakarusa, IN, 46573; Mr. Charles E. Klatt Senior Director Codes Legalities Testing & Training Holiday Rambler Corporation 65528 St. Road 19 Wakarusa IN 46573; Dear Mr. Klatt: This responds to your June 1, 1977, letter asking several question about the applicability of Federal safety standards to travel trailers and motor homes.; You first ask whether bed sheets and decorative bedspreads shipped wit a motor home are required to meet Standard No. 302, *Flammability of Interior Materials*. The items required to meet the standard are listed in S4.1 of the standard. That list does not include sheets or bedspreads. Therefore, they are not required to comply with the standard.; In a related question pertaining to Standard No. 302, you ask whethe 'mattress cover' as that term is used in the standard refers to the permanent mattress ticking or to a removable mattress cover. The National Highway Traffic Safety Administration (NHTSA) has determined that the standard applies to both the permanent ticking and the removable cover. Therefore, both must comply with the requirements of Standard NO. 302.; In a question pertaining to Standard No. 207, *Seating Systems*, yo ask whether it is permissible to label a bench seat 'not for occupancy while vehicle is in motion' on one label or whether a seat must be labeled at each seating position. Standard No. 207 requires only one label for a bench seat in a motor home. You should note that Standard No. 207 does not apply to travel trailers.; You ask whether the NHTSA has jurisdiction over safety-related defect in motor homes not covered by safety standards. The agency has general defect jurisdiction granted by the National Traffic and Motor Vehicle Safety Act (15 U.S.C. 1381 *et seq*.) for all safety-related motor vehicle defects. The NHTSA's defect jurisdiction also extends to the nonoperational safety of a vehicle.; In a final question you ask whether the agency has jurisdiction ove travel trailers. The NHTSA has jurisdiction over 'any motor vehicle' which is defined in the Act as 'any vehicle driven or drawn by mechanical power...' Therefore, the NHTSA has jurisdiction over travel trailers that is identical to its jurisdiction over any other motor vehicle.; Sincerely, Joseph J. Levin, Jr., Chief Counsel |
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ID: nht94-2.27OpenTYPE: Interpretation-NHTSA DATE: April 8, 1994 FROM: John Womack -- Acting Chief Counsel, NHTSA TO: Perry McGlothan -- Quality Assurance Test Specialist, Century Products Company (Macedonia, OH) TITLE: None ATTACHMT: Attached to letter dated 12/15/93 from Perry McGlothan to Chief Counsel, NHTSA (OCC 9495) TEXT: This responds to your letter to me about the head impact protection and protrusion limitation requirements of Federal Motor Vehicle Safety Standard (FMVSS) No. 213, Child Restraint Systems. We received under separate cover the three child seats you sent for illustration purposes, samples of Models 4560, 4590 and the STE 1000. You discuss in your letter a new method you would like to use to attach the head impact protection foam to the child restraint shell. The foam would be attached to the shell by means of two push-in pins, each 1/2 inch in length and with a 3/4 inch diame ter head, as distinguished from the padding being glued to the shell as in the past. You stated that this change would better secure the foam padding to the shell and help your manufacturing process. You asked us whether the new method would meet the h ead impact protection requirement of S5.2.3 (for restraints recommended for children weighing less than 20 pounds) and the protrusion limitations of S5.2.4. As you know, the National Traffic and Motor Vehicle Safety Act establishes a self-certification system under which manufacturers are responsible for ensuring that their products comply with all applicable FMVSSs. We do not approve, endorse, or give assu rances of compliance of any product. NHTSA may examine the manufacturer's certification in the course of any enforcement action. In response to manufacturers' requests for interpretations of the FMVSS's, we try, to the extent possible, to provide infor mation that will help them make their determinations of compliance. However, these responses are based on information provided by the manufacturer, and it subject to the findings of actual compliance testing by the agency. Should the agency, in the fut ure, examine production units of these models and detect an apparent noncompliance or defect, those results will control. You first inquire, "Please advise as to compression deflection," which we understand as asking whether S5.2.3.2 would permit you to secure the foam with the pins. (*1) S5.2.3.2 states that each system surface, except for protrusions that comply with S5 .2.4, which is contactable by a dummy head must be covered with slow recovery, energy absorbing material with specified characteristics. As explained in the next paragraph, the pins we examined appear to satisfy S5.2.4. Further, the pins might not be c ontactable by the dummy head in Standard 213's dynamic test. However, whether they are contactable can only be determined in the standard's dynamic test. S5.2.4 requires that any portion of a rigid structural component within or underlying a contactable surface, or any portion of a child restraint system surface that is subject to S5.2.3 shall meet specified limits on height and radius of exposed edge. B ased on our visual inspection, the pins we saw appear to be within those limits. Again, however, the Vehicle Safety Act places the responsibility for determining compliance in the first instance on you, the manufacturer of the child restraint. We still have the three seats that you sent us. We plan to dispose of them unless we hear from you. I hope this information is helpful to you. Should you have any further questions or need further information, please feel free to contact Walter Myers of this office at this address or at (202) 366-2992. * 1 We cannot tell you whether the foam padding would satisfy S5.2.3 of Standard 213. The compression deflection resistance and thickness of the material can only be determined in a compliance laboratory, using the laboratory procedures described in th e standard. |
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.