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: nht88-4.39OpenTYPE: INTERPRETATION-NHTSA DATE: 12/16/88 FROM: MILTON GURNY -- HEIN SMITH BEREZIN MALOOF AND SPINELLA TO: JOAN CLAYBROOK -- NATIONAL TRANSPORTATION SAFETY BOARD TITLE: TITLE SCHWANEWEDE VS. MARBELL, INC., ET AL. OUR FILE NO. 34577 ATTACHMT: ATTACHED TO LETTER DATED 04/05/89, FROM ERIKA Z. JONES -- NHTSA TO MILTON GURNEY, REDBOOK A33(8), STANDARD 218, VSA SECTION 108(A)(1)(A), SECTION 108(A)(2)(A), VSA SECTION 108(B)(1) TEXT: Dear Ms. Claybrook: Could you please advise us whether a 1975 Chevrolet Impala was required by Federal Statute and Regulations to have a seat belt and a shoulder belt harnass. Your cooperation in this regard will be appreciated. Very truly yours, |
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ID: nht73-4.39OpenDATE: 07/30/73 FROM: AUTHOR UNAVAILABLE; Richard B. Dyson; NHTSA TO: Mr. Barry Kulik TITLE: FMVSS INTERPRETATION TEXT: This is in reply to your letter of May 18, 1973, concerning the method of testing the sensitivity of seat sensors under sections S7.3 and S7.4 of Federal Motor Vehicle Safety Standard No. 208. The relevant characteristics of the "person" referred to in these sections are found in the weight and dimension table of Section S7.1.3 of the standard. Our testing laboratory will, in all likelihood, be using test dummies purchased from the various commercial dummy manufacturers, whose weights and dimensions conform to S7.1.3 of the standard. Human volunteers could be used, but the dimensional controls are difficult to maintain and we do not regard liver persons as a practical means of testing sensors under the standard. |
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ID: nht68-1.46OpenDATE: 01/29/68 FROM: AUTHOR UNAVAILABLE; Robert M. O'Mahoney; NHTSA TO: Messrs. Gilbert; Segall and Young TITLE: FMVSR INTERPRETATION TEXT: In answer to your letter of December 15 I am enclosing a copy of the regulations published January 10 governing the importation of motor vehicles subject to the Federal motor vehicle safety standards. You have advised us that Rolls-Royce prefers to affix the certification required by section 114 of P.L. 89-563 during manufacture of its passenger cars, and to install seat belts after importation of such cars into the United States. The regulations (19 C.F.R. 12.80(b)(iv) will allow Rolls-Royce to do so providing the informational label it prescribes is affixed to the windshield of these cars during shipment. I hope this is satisfactory to your client. |
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ID: ES16-001603 Listou Trailer ResponseOpen
Mr. Robert Listou 3440 South Jefferson Street Apartment 1125 Falls Church, VA 22041
Dear Mr. Listou:
Thank you for your letter to the National Highway Traffic Safety Administration (NHTSA) asking about NHTSAs requirements for a trailer and hitch design you invented and for which, you state, you have submitted a provisional patent. Senator Mark R. Warner has also contacted us on your behalf. I am pleased to respond.
You state in your letter that you have invented a concept for a trailer designed for hauling household trash that residents in rural areas can use to carry trash to a designated location. According to your letter, the product would be a collapsible trailer and hitch designed with portability in mind. The trailer folds for storage in a passenger vehicles trunk, and the hitch is configured in a way that would allow it to be temporarily installed in the trunk of any vehicle by bracing against the trunks contours. You ask whether your invention would comply with the Federal motor vehicle safety standards (FMVSSs).
By way of background, NHTSA is authorized by the National Traffic and Motor Vehicle Safety Act (Safety Act, 49 U.S.C. Chapter 301) to issue FMVSSs that set performance requirements for new motor vehicles and new items of motor vehicle equipment. NHTSA does not approve motor vehicles or motor vehicle equipment and does not determine whether a product conforms to the FMVSSs outside of an agency compliance proceeding. Instead, the Safety Act requires manufacturers to self-certify that their products conform to all applicable FMVSSs. Manufacturers are also responsible for ensuring that their products are free of safety-related defects.
Since NHTSA does not approve products, we are not in a position to determine for you the FMVSSs that would apply to your product and whether your product would comply. The responsibility to assure compliance would rest with the manufacturer of the product.
However, we are able to discuss generally portions of the Safety Act and the FMVSSs that are particularly relevant to your invention. In doing so, though, we note that our answers are limited by the breadth of your question and the limited description of the trailer and hitch in your letter. Further, we emphasize the person manufacturing your collapsible trailer and hitch is responsible for ensuring compliance of the product with all applicable FMVSSs. Our answer is based on our understanding of the facts based on the information you provided.
Trailer is defined in our regulations (49 C.F.R. 571.3) as a motor vehicle with or without motive power, designed for carrying persons or property and for being drawn by another motor vehicle. We believe that the item described in your provisional patent is a trailer under NHTSA regulations, as it is designed for carrying persons or property and for being drawn by another motor vehicle.
Our regulations require trailers to meet certain FMVSSs, such as those for lighting (FMVSS No. 108), tires, braking systems, brake hoses and brake fluids. There are also procedural requirements for their manufacturer, such as requirements for certifying the trailers compliance with the FMVSSs.
In addition, if your product is installed in a new or used motor vehicle, you need to take into consideration the make inoperative provision[1] of the Safety Act, which states that: A manufacturer, distributor, dealer, or motor vehicle repair business may not knowingly make inoperative any part of a device or element of design installed on or in a motor vehicle in compliance with an applicable motor vehicle safety standard prescribed under this chapter.
The make inoperative prohibition requires the entities listed in 30122 to not knowingly remove, disconnect, or degrade the performance of safety equipment installed in compliance with an applicable FMVSS. For example, if an entity were to install this trailer or hitch in a new or used vehicle, it would need to ensure that its installation does not make inoperative the vehicles compliance with the lamps, reflective devices, and associated equipment requirements of FMVSS No. 108.
Please note also that State and local jurisdictions have the authority to set requirements that apply to the use of vehicles and may have regulations applying to the operation of a trailer and hitch such as yours. We suggest you contact State and local officials for information on possible requirements applying to your product. I hope this information is helpful. If you have further questions, please contact my office.
Sincerely,
Alison Pascale Director, Governmental Affairs, Policy and Strategic Planning
cc: Washington Office
Dated: 5/4/16 Ref: Standard No. 108 and 49 U.S.C. 30122
[1] 49 U.S.C. 30122. |
2016 |
ID: nht93-3.44OpenDATE: May 15, 1993 FROM: Lillie Rene Erwin -- 365089, TDC Mt View Unit H-1 TO: Andrew H. Card -- Secretary of Transportation COPYEE: Illegible TITLE: None ATTACHMT: Attached to letter dated 7/21/93 from John Womack to Lillie Rene Erwin (A41; Std. 208) TEXT: I AM PRESENTLY INCARCERATEO IN THE TDCJ-ID PRISON SYSTEM AT GATESVILLE, TX. THE STATE OF TEXAS IS TRANSPORTING PRISONERS IN A MANNER DETRIMENTAL TO THEIR HEALTH. NAMELY PRISONERS ARE RENDERED VIRTUALLY HELPLESS EQUAL TO AN INFANT DUE TO BEING HANDCUFFED TOGETHER AND HAVING NO SAFETY DEVICES TO PREVENT INJURY IN CASE OF AN ACCIDENT. I AND OTHERS HAVE BEEN INJURED IN THIS MANNER. WE ARE MADE TO SIT ON A METAL SEAT THAT IS EIGHT TO TEN INCHES AND WE ARE THROWN ABOUT IN THE VAN AGAINST A METAL GUARD RAIL. THIS MAKES US VIRTUAL FLYING OBJECTS WHEN A NEGLIGENT DRIVER IS SPEEDING (OFTEN HAPPENS) AND WHEN THERE IS AN ACCIDENT. I VERY MUCH NEED TO FIND OUT WHO TO CONTACT ME IN VOICING MY COMPLAINT. ANY INFORMATION THAT YOU CAN GIVE ME IS WELCOMED. THANK YOU. |
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ID: aiam1320OpenJ. B. H. Knight, Rolls-Royce Motors Limited, Car Division, Crewe Cheshire CWI, 3PL England; J. B. H. Knight Rolls-Royce Motors Limited Car Division Crewe Cheshire CWI 3PL England; Dear Mr. Knight: This is in reply to your letter of October 16, 1973, requesting clarification of S7.2 of Federal Motor Vehicle Safety Standard No. 301 (9-1-75) (Docket No. 70-20, Notice 2).; As you are aware, a proposed amendment to Federal Motor Vehicle Safet Standard No. 301 (9-1-75) was published on August 20, 1973 with an anticipated September 1975 effective date (Docket No. 73-20, Notice 1). In the event that the proposed amendment of loading conditions is adopted, the present passenger car requirement, that the vehicle be at its GVWR during testing, will be superseded by the requirement that the passenger car be loaded 'to its unloaded vehicle weight plus its rated cargo and luggage capacity weight, secured in the luggage area, plus the weight of the necessary dummies.' under these specifications, rear sear occupant weight will not be a factor of the test load condition unless a specific test requirement calls for dummies to be placed in designated rear seating positions. The proposed amendment would also make it unnecessary to firmly fix the dummies to the vehicle as is presently the case under S7.2.; We have also noted your views on luggage capacity weight and ar placing your letter in Docket No. 73-20 as a comment to be considered.; If you require any further clarification, please do not hesitate to le us know.; Sincerely, Lawrence R. Schneider, Chief Counsel |
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ID: nht69-2.24OpenDATE: 09/19/69 FROM: AUTHOR UNAVAILABLE; Robert Brenner; NHTSA TO: Bus and Truck Supply Co. TITLE: FMVSR INTERPRETATION TEXT: This is in reply to your letter of August 6, 1969, and August 15, 1969, in which you request approval of an alternative to the label locations specified in Section 367.4(c) of the Certification Regulations that will be effective as to vehicles manufactured on or after September 1, 1969. The location you have selected is not considered to be in the same general area, left side of the vehicle, as specified. In view of the fact that interested parties will be looking for the label in that general area, your proposed location, on the right side forward of the entrance door, is not approved. Please select another location that would be in the general area of the driver's seat and submit for approval. The nomenclature on your label, as shown in drawing No. BS6111-007, does not fulfill the requirements of Part 367.4(g) of the regulations in that the required information is not presented in the order prescribed. Your cooperation is appreciated. |
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ID: nht88-1.40OpenTYPE: INTERPRETATION-NHTSA DATE: 02/12/88 FROM: FRANK H. MILLER -- GERRY BABY PRODUCTS QUALITY ENGINEER TO: ERIKA Z. JONES -- CHIEF COUNSEL NHTSA TITLE: NONE ATTACHMT: ATTACHED TO LETTER DATED 08/02/89 FROM STEPHEN P. WOOD -- NHTSA TO FRANK MILLER -- GERRY BABY PRODUCTS; RED BOOK A33; FMVSS 302 TEXT: Dear Ms. Jones: This is in further reference to my communication to you dated October 19, 1987 and also to your response received December 3, 1987. Both were in reference to paragraph S4.2.1 of Safety Standard No. 302, "Flammability of Interior Materials". I appreciate your response regarding the testing of threads used in the manufacture of seat cushions and testing them as a part of the component and now would like to know if the binding we use on the edges of the cushion should also be tested as a part of the material. We currently test it as an independent entity but it would ease our testing if it were to be done as a portion of a cushion assembly. Thank you for your attention to this matter. Sincerely, |
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ID: 21568.drnOpenMr. James T. Castle Dear Mr. Castle: This responds to your April 10, 2000, request for an interpretation of the National Highway Traffic Safety Administration's (NHTSA's) prohibition on dealers selling new 15-person vans for transporting children to or from school or related events. You wish to know whether the prohibition affects children in custodial care facilities such as summer camps. Our answer is provided below. In a telephone conversation with Dorothy Nakama of my staff, you explained that by "summer camp" you mean that in the summer, Clemson University hosts children in the twelfth grade and below who want to improve their athletic skills. The children live at Clemson dormitories. Because of distances involved, the children may have to be transported between various sites (e.g., dormitory and athletic field) on the Clemson campus. Some background information may be helpful. NHTSA is authorized to issue and enforce Federal motor vehicle safety standards (FMVSSs) applicable to new motor vehicles. Our statute at 49 U.S.C. 30112 requires any person selling or leasing a new vehicle to sell or lease a vehicle that meets all applicable standards. Accordingly, persons selling or leasing a new "school bus" must sell or lease a vehicle that meets the safety standards applicable to school buses. Our statute defines a "schoolbus" as any vehicle that is designed for carrying a driver and more than 10 passengers and which, NHTSA decides, is likely to be "used significantly" to transport "preprimary, primary, and secondary" students to or from school or related events. 49 U.S.C. 30125. By regulation, the capacity threshold for school buses corresponds to that of buses -- vehicles designed for carrying more than ten (10) persons. For example, a 15-person van that is likely to be used significantly to transport students is a "school bus." Persons selling or leasing new 15-person vans for such use must sell or lease a van that meets our school bus standards. In the past, when reviewing a dealer's sale of a new vehicle, NHTSA looked at the nature of the institution purchasing the vehicle. In recent interpretations (see the attached July 17, 1998, letter to Mr. Greg Balmer of the YMCA), we noted that it was more appropriate to consider the extent to which the buses are used to carry children to or from school or related events. In the Balmer letter, we stressed that, even if a bus were sold to a facility that provides custodial care (i.e., to a facility that is not a "school"), if that facility were purchasing the new bus to use significantly to transport students to or from a school or events related to a school, a dealer knowing of this purpose would be required to sell a school bus. Turning to your letter, you ask about vehicles that would be used to transport children in "summer camps." Based on the facts provided about Clemson University's "summer camp," we would not consider Clemson's "summer camp" as a "school" because apparently, no education is to be provided to the children. Since there would be no significant use of the vehicles to transport children to or from school or related events, a dealer knowing of this purpose that wishes to sell you a new bus (e.g., a 15-person van) would not have to sell you only a bus that meets our school bus standards. Because our laws apply only to the manufacture and sale of new motor vehicles, we do not prohibit institutions such as your "summer camp" from using large vans to transport school children, even when the vehicles do not meet Federal school bus safety standards. However, each State has the authority to set its own standards regarding the use of motor vehicles, including school buses. For this reason, South Carolina law should be consulted to see if there are regulations about how children must be transported. You asked for clarification of what "significant" means. There is no definitive answer to this question, but I have provided a basic guideline in an interpretation letter dated May 20, 1999 to Mr. Dennis Seavey of Plus Time New Hampshire (copy enclosed). The letter to Mr. Seavey explains that NHTSA considers "transportation provided to or from school on any two days during a week to be regular use and therefore 'significant.'" In conclusion, we wish to emphasize that school buses are one of the safest forms of transportation in this country, and that we therefore strongly recommend that all buses that are used to transport school children be certified as meeting NHTSA's school bus safety standards. In addition, using 15-person vans that do not meet NHTSA's school bus standards to transport students could result in liability in the event of a crash. I am enclosing NHTSA's publication: "School Bus Safety: Safe Passage for America's Children." This brochure explains the safety enhancements of a school bus that makes school buses safer than "conventional vans." There are small school buses available that seat 15 children. While school buses are more expensive than large vans, we believe that the cost difference is not so large that it should prevent facilities from acquiring school buses. The cost range for 15-person school buses is approximately $30-32,000, compared to $25-28,000 for 15-person vans. The longer service life for school buses will offset a part of this difference. Our belief that vehicles providing the safety of school buses should be used whenever transporting children in buses is shared by the National Transportation Safety Board (NTSB). At a June 8, 1999, public meeting, the NTSB issued the attached abstract of a special investigative report on nonconforming buses. The NTSB issued the report after investigating four crashes in 1998 and 1999 in which 9 people were killed and 36 injured when riding in "nonconforming buses." NTSB defines "nonconforming bus" as a "bus that does not meet the FMVSSs specific to school buses." Most of the victims, including eight of the fatalities, were children. In the abstract of its report, the NTSB issued several Safety Recommendations, including the following that was directed to child care providers such as the National Association of Child Care Professionals, the National Child Care Association, and Young Mens' and Young Women's Christian Associations:
I am also enclosing NHTSA's February 1999 "Guideline for the Safe Transportation of Pre-school Age Children in School Buses." This guideline establishes NHTSA's recommendations for how pre-school age children should be transported in school buses. I hope this information is helpful. If you have any further questions about NHTSA's programs, please feel free to contact Dorothy Nakama of my staff at this address or at (202) 366-2992. Sincerely, |
2000 |
ID: nht91-6.48OpenDATE: November 1, 1991 FROM: Sandra Mesh-Witucki -- Paralegal, McGraw, Borchard, & Martin TO: Mary Versailles -- Office of Chief Counsel, NHTSA TITLE: Gettel ATTACHMT: Attached to letter dated 12-10-91 from Paul Jackson Rice to Sandra Mesh-Witucki (A38; Std. 208) TEXT: In recapping our telephone conversation, this case involves a 1987 Chevrolet Cargo Van Conversion which was involved in an accident in which a vehicle driven northbound in the same southbound lane struck the van head-on. Allegedly, a rear seat passenger suffered a spinal fracture from the lap belt. I have enclosed the requested information: GBWR weight of 4,138 before conversion; invoice of the original manufacture; invoice of original purchase. I have not been able to get a weight or weight estimate for the van following conversion. Please forward a certified copy of all rules/standards applicable to this van both before and after conversion, and any other information you feel may be of assistance. If any fee is involved in procuring this information, pleas forward your bill which will be paid promptly. If there are any questions or more information is needed, please call. Thank you. |
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.