
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: nht92-8.17OpenDATE: March 26, 1992 FROM: Michael J. Sens -- Researcher, S.E.A., Inc. TO: Paul Jackson Rice -- Chief Counsel, NHTSA TITLE: None ATTACHMT: Attached to letter dated 4/17/92 from Paul J. Rice to Michael J. Sens (A39; Std. 206; Part 571; Part 567) TEXT: By way of this letter, I am seeking an interpretation of FMVSS 206, 214, and 216 as they would pertain to a 1985 Jeep CJ-7. The Jeep CJ-7 was classified (it is no longer in production) by its manufacturer, American Motors Corporation, as a "sport-utility vehicle". The vehicle came with a soft top and a removable fiberglass top option. The side doors are easily removable. FMVSS 206, "Door Locks and Door Rentention Components," requires at S4. that "components on any side door leading directly into a compartment that contains one or more seating accommodations shall conform to this standard." It goes on to say, "However, components on folding doors, roll-up doors and doors that are designed to be easily attached to or removed from motor vehicles manufactured for operation without doors need not conform to this standard". My first question is: since the 1985 Jeep CJ-7's side doors are easily attached and removed by design for operation in a doorless manner, is it exempt from conformity to FMVSS 206? FMVSS 214, "Side Door Strength," states at S2. that "this standard applies to passenger cars." The 1985 Jeep CJ-7 is defined by its manufacturer as a "sport-utility vehicle." This classification is not that of a "passenger car." My second question is: since the 1985 Jeep CJ-7 is classified as a "sport-utility vehicle," does FMVSS 214 apply to it? FMVSS 216, "Roof Crush Resistance-Passenger Cars," states at S3. that "This standard applies to passenger cars." After stating that it does not apply to vehicles that conform to the rollover test requirements of S5.3 of standard 208, it continues, "It also does not apply to convertibles." My third question is: since the 1985 Jeep CJ-7 is classified as a "sports-utility vehicle" and is a convertible, does FMVSS 216 apply to it? Please find enclosed two views of the type vehicle under discussion. The 1985 CJ-7 shows the soft-top package with the top down and the side doors removed. Unfortunately, I do not have an illustration of the 1985 CJ-7 with the optional hard snap-on top. However, the 1981 CJ-7 model photograph enclosed is typical of how the 1980's CJ-7 line appeared with the optional top. Thank you in advance for your time and considerations on this issue. If you require additional information, do not hesitate to contact me. Attachment Photos and text pertaining to the 1981 and 1985 CJ-7 vehicles. (Text and graphics omitted) |
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ID: nht92-8.18OpenDATE: March 26, 1992 FROM: Paul Jackson Rice -- Chief Counsel, NHTSA TO: Charles W. O'Conner -- Assistant Secretary, Echlin Inc. COPYEE: Larry Henneberger; Bill Lewandoski; California Highway Patrol TITLE: None ATTACHMT: Attached to letter dated 12/26/91 from Charles W. O'Connor to Paul J. Rice (OCC 6863) TEXT: This responds to your letters of December 26, 1991, and February 25, 1992, with respect to various interpretive letters of this Office on the Commander and Voyager Electronic Brake Control ("Control"). The Control is manufactured by your subsidiary, Tekonsha Engineering Company. For the reasons enunciated in your December letter, you have asked us to "rule that all three of your letters i.e., the November 22 and May 23, 1991, letters to Mr. Lewandoski and your letter of September 10, 1990, to Mr. Henneberger are all void from the beginning." We are replying on the basis of information presented by representatives of Tekonsha, Mr. Henneberger, and yourself in a meeting with representatives of NHTSA on March 18, 1992, rather than on the basis of your December letter. This meeting brought forth facts, previously unknown to us, and which did not, therefore, form a basis for the three previous letters on this subject mentioned above. We now understand that the Control is motor vehicle equipment which is added to the towing vehicle by the seller of the towed vehicle, at a time subsequent to the first purchase of the towed vehicle for purposes other than resale. The Control has no effect upon the stop lamp system of the towing vehicle. The Control in ordinary operation has no effect upon the stop lamp system of the towed vehicle. When hand-activated in an emergency mode, the Control applies a modulated pressure to the service brakes of the towed vehicle, without activating the stop lamps on the towed vehicle. It is theoretically possible that the Control will never be operated during the life of the towing vehicle. It is our opinion that the applicable Federal law in this situation is that which pertains to the operation of vehicles in use, rather than the Federal motor vehicle safety standards that apply to motor vehicles before their first purchase for purposes other than resale. This means that we do not view this as a question of compliance with Federal Motor Vehicle Safety Standard No. 108 or a matter concerning the preemption of State statutes by Standard No. 108. Under the statutes and regulations we administer, the applicable law is 15 U.S.C. Section 1397(a)(2)(A). This Section states in pertinent part: "No manufacturer, distributor, dealer, or motor vehicle repair business shall knowingly render inoperative, in whole or in part, any device or element of design installed on or in a motor vehicle or motor vehicle equipment in compliance with an applicable Federal motor vehicle safety standard . . . ."
The question therefore is whether the installation of the Control on the towing vehicle by the dealer of the towed vehicle renders the stop lamps (installed on the towed vehicle in compliance with Standard No. 108) inoperative in whole or in part within the meaning of Section 1397(a)(2)(A). We note that the installation per se of the Control has no effect of any sort on the stop lamps of the vehicle on which it is installed, or on the vehicle that is towed. Therefore, the dealer has not rendered any stop lamps inoperative by the act of installing the Control. It is the use of the Control that may have an effect upon the stop lamps. In ordinary use, the Control has no effect upon the stop lamps of either the towing or towed vehicle. However, when the hand control of the device is activated in the emergency mode on the towing vehicle, to slow the swaying of the towed vehicle through application of the only set of brakes on the towed vehicle (its service brakes), the stop lamps will not be activated. In the conscious act of activating the emergency feature, the operator has knowingly rendered the stop lamps on the towed vehicle inoperative for the duration of such activation (unless or until the operator applies the service brake of the towing vehicle). However, Section 1397(a)(2)(A) does not apply to operators, thus the activation and use of the Control is not prohibited under our Statutes and regulations. On the basis of the facts presented in the meeting on March 18, it now appears that the sale of the control is not in violation of the National Traffic and Motor Vehicle Safety Act. |
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ID: nht92-8.19OpenDATE: March 24, 1992 FROM: George F. Reuss -- Reuss Engineers, Inc. TO: Barry Felrice -- Associate Administrator for Rule Making, NHTSA TITLE: None ATTACHMT: Attached to letter dated 4/29/92 from Paul J. Rice to George F. Reuss (A39; VSA 102 (3)) TEXT: Reuss Engineers Has received a patent for a propietary vehicle to pick up and transport autombiles. We have produced a practical prototype and are ready to produce commercial models for sale. We are interested in knowing which specific regulations and standards apply. The complete vehicle consists of a purchased chassis with a GVWR greater than 10,000 pounds. Between the cab and the rear wheels is inserted a structural frame including moveable forks that can be extended from the framework and inserted beneath an automobiles' tires. The forks are raised, carrying the automobile with them, and retracted into the frame work. The vehicle containing the automobile is driven to any destination and the proceedure reversed. Enclosed are 2 pages of the patent giving a pictorial representation. We appreciate any help and guidance. Thank yo for your prompt attention. Attachment Copy of patent number 5,067,869, dated 11/26/91. (Text and graphics omitted.) |
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ID: nht92-8.2OpenDATE: April 3, 1992 FROM: Paul Jackson Rice -- Chief Counsel, NHTSA TO: Charles Danis -- Les Enterprises Track Test Inc. (Quebec) TITLE: None ATTACHMT: Attached to letter dated 2/7/92 from Charles Danis to Paul J. Rice (OCC 6991) TEXT: This responds to your letter about testing related to Federal motor vehicle safety standard No. 121, Air Brake Systems, (49 CFR S571.121). You explained that your company has recently conducted a compliance test on an articulated bus manufactured by MCI Greyhound Canada. According to your letter, the buses were tested using 28 psi for the brake actuation test and 40 psi for the brake release test. While these air pressures differ from the pressures specified in S5.3.3 and S5.3.4 for brake actuation and release times, you stated that MCI was relying on a July 23, 1976 interpretation issued by the agency to Mr. J.W. Lawrence of the White Motor Corporation that permitted such brake actuation and release pressures. We note that to be consistent with that interpretation, the maximum brake chamber pressure must have been 40 psi when the service reservoir pressure was at 100 psi. Your letter was not clear on that point. You asked whether this interpretation is still valid. As explained below, the answer is yes. In its inquiry to NHTSA, White Motor Corporation asked whether S5.3.3 and S5.3.4 of Standard No. 121 require minimum brake chamber actuation and release time pressures of 60 psi and 95 psi, respectively, or whether these air pressures are included in the sections only as "bench marks" on which to base specifications for minimum actuation and release timing. In response, the agency's July 23, 1976 interpretation letter stated in relevant part that: Your understanding that S5.3.3 and S5.3.4 only specify the air pressures of 60 psi and 95 psi as the basis for timing requirements is correct. Neither value is intended as a requirement that the vehicle be designed to provide a certain level of brake chamber air pressure. The values were based on an understanding of the typical configuration of existing air brake systems at the time the final rule was issued. In response to your specific question, NHTSA's July 23, 1976 interpretation letter continues to be valid. I hope this information is helpful. If you have any further questions about NHTSA's safety standards, please feel free to contact Marvin Shaw of my staff at this address or by telephone at (202) 366-2992. |
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ID: nht92-8.20OpenDATE: March 24, 1992 FROM: Tm Kozy -- Marketing Director, Infini Med TO: Office of the Chief Council, NHTSA TITLE: None ATTACHMT: Attached to letter dated 5/5/92 from Paul J. Rice to Tm Kozy (A39; Std. 208; VSA 108 (a)(2)(A)) TEXT: I have a question regarding the use of adaptive aids (hand controls) in cars equipped with air bags. Is it illegal to install a hand control unit that is drilled into the steering column that, according to a bulletin issued by Chrysler Corporation referring to the Federal Motor Vehicle Safety Standard 208, voids the warranty on the air bag as it may render the system inoperative? On the same subject, I need to know if such a unit were installed on an air bag equipped vehicle, and that same vehicle is resold in, say a year or two, is the seller required by law to notify the next buyer that the warranty on the airbag system has been voided, even though the controls may now have been removed? We need to know the answers to these questions from a marketing standpoint, and also because I use hand controls myself. Thank you for any help you can give us regarding this matter. |
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ID: nht92-8.21OpenDATE: March 23, 1992 FROM: Paul Jackson Rice -- Chief Counsel, NHTSA TO: Kenneth R. Brownstein -- Senior Counsel, PACCAR Inc. TITLE: None ATTACHMT: Attached to letter dated 2/3/92 from Kenneth R. Brownstein to Office of the Chief Counsel, NHTSA (OCC 6962) TEXT: This responds to your letter, requesting that the agency clarify a provision in Standard No. 120, Tire Selection and Rims for Motor Vehicles Other than Passenger Cars. (49 CFR S571.120) Specifically, you asked whether under section S5.1.3, a vehicle manufacturer could, if requested by the purchaser, install retreaded tires procured by the manufacturer on a new vehicle. You stated that allowing the vehicle manufacture to buy retreaded tires would be more efficient and would help the truck owner to avoid having to make a separate purchase. I welcome this opportunity to respond to your request for an interpretation. Section S5.1.3 of Standard No. 120 states: In place of tires that meet the requirements of Standard No. 119, a truck, bus, or trailer may at the request of a purchaser be equipped at the place of manufacture of the vehicle with retreaded or used tires owned or leased by the purchaser, if the sum of the maximum load ratings meets the requirements of S5.1.2. Used tires employed under this provision must have been originally manufactured to comply with Standard No. 119, as evidenced by the DOT symbol. For the vehicle manufacturer to install retreaded or used tires on a new truck, bus, or trailer, section S5.1.3 specifies that five conditions must be satisfied. These are: (1) the purchaser must request such a retreaded or used tire, (2) the vehicle must be equipped with the retreaded or used tire at the vehicle's place of manufacture, (3) the retreaded or used tire to be installed must be owned or leased by the purchaser, (4) the sum of the maximum load ratings of the tires on each axle must be not less than the gross axle weight rating of that axle, and (5) used tires equipped on the vehicle must have been originally manufactured to comply with Standard No. 119 (and contain the DOT certification symbol). Your letter indicates that in buying the retreaded tires at the purchaser's request, PACCAR's actions would comply with the first condition (and presumably the second condition). However, since PACCAR and not the vehicle purchaser would supply the tire, your requested action clearly would not comply with the third condition which requires the retreaded or used tire to be owned by the purchaser. This condition permits a purchaser to order a new vehicle without any tires and install any tire it may choose. It is not clear from your letter whether the fourth condition would be satisfied. The fifth condition is not applicable to retreaded truck tires, since such tires are not required to have a DOT certification symbol on their sidewalls. Based on the above, we conclude that having a vehicle manufacturer supply a retreaded or used tire for a new vehicle would not comply with S5.1.3. We disagree with your view that the purpose of section S5.1.3 is to allow the purchaser to choose whether the new vehicle has retread tires and to ensure it has knowledge of this fact. As discussed in the enclosed Federal Register notice, the purpose of the provision is to accommodate a practice in which fleet operators send tires from their tire banks to the vehicle manufacturer for installation on new vehicles they buy. A tire bank is composed of tires with usable tread left on them which have been taken off vehicles no longer in service. (49 FR 20822, 20823, May 17, 1984). I hope this information is helpful. If you have any further questions about NHTSA's safety standards, please feel free to contact Marvin Shaw of my staff at this address or by telephone at (202) 366-2992. Attachment Copy of Federal Register, vol. 49, No. 97, 5/17/84: rules and regulations. Pertains to 49 CFR Part 571 (docket No. 80-16; Notice 2): Tire Selection and Rims for Motor Vehicles Other Than Passenger Cars. (Text omitted) |
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ID: nht92-8.22OpenDATE: March 20, 1992 FROM: John W. Phillips -- Project Engineer, Transportation Research Center of Ohio TO: Office of Chief Council, NHTSA TITLE: None ATTACHMT: Attached to letter dated 5/5/92 from Paul J. Rice to John W. Phillips (A39; Std. 202) TEXT: As instructed by Mr. Ed Jetner of the National Highway Traffic Safety Administration on March 17, 1992, I am contacting you regarding the FMVSS 202, head restraint standard. The Transportation Research Center Inc. (TRC) has scheduled a FMVSS 202 test on April 7, 1992. FMVSS 202 describes a "dummy having the weight and seated height of a 95th percentile adult male with an approved representation of a human, articulated neck structure, or an approved equivalent test device." The TRC is recommending the use of the Hybrid III large male dummy manufactured by First Technologies, Model Number H3-95-R with the 1992 pelvis upgrade, to conduct this test. TRC believes this dummy represents the most "state of the art" 95th percentile dummy currently available. Please advise TRC if the Hybrid III large male dummy is an approved equivalent test device for conducting the FMVSS 202 test. Please respond to the undersigned at 513/666-2011 by April 2, 1992. Thank you for your time with this matter. |
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ID: nht92-8.23OpenDATE: March 19, 1992 FROM: Paul Jackson Rice -- Chief Counsel, NHTSA TO: Wm. Richard Alexander -- Chief, Pupil Transportation, Maryland State Department of Education, Office of Administration and Finance TITLE: None ATTACHMT: Attached to letter dated 2/18/92 from Wm. Richard Alexander to Mary Versailles (OCC 7021) TEXT: This responds to your letter of February 18, 1992 requesting confirmation "that forward-facing wheelchairs on school buses do not need a crash barrier located forward of each wheelchair position." As explained below, your understanding is correct. Section S5.2 of Standard No. 222, School bus passenger seating and crash protection, requires "a restraining barrier forward of any designated seating position that does not have the rear surface of another school bus passenger seat within 24 inches of its seating reference point." Under S5.2.1, the rear surface of the restraining barrier must be within a distance of 24 inches or less from the seating reference point. Standard No. 222's requirement for a restraining barrier does not apply to wheelchair positions. First, a wheelchair position is not technically a "designated seating position," as that term is defined in 49 CFR 571.3. Second, Standard No. 222's seating requirements apply only to "school bus passenger seats." See S1 of Standard No. 222. The term "school bus passenger seat" is defined in S4 as "a seat in a school bus, other than the driver's seat or a seat installed to accommodate handicapped or convalescent passengers." I would also note that installing a crash barrier forward of a wheelchair securement location in compliance with S5.2.1 would appear to be impractical. First, the seating reference point could move depending on the type of wheelchair secured at the location. Second, many wheelchairs would not fit behind a restraining barrier complying with S5.2.1 as some are longer than 24 inches forward of the seating reference point. While the current requirements of Standard No. 222 do not have any requirements for wheelchair securement locations, NHTSA is concerned about providing crash protection for all students on school buses. NHTSA has recently published a notice of proposed rulemaking concerning requirements for wheelchair securement devices and occupant restraint systems on school buses. The notice proposed amending Standard No. 222 to include minimum strength and location requirements for the anchorages for securement and restraint devices and minimum strength requirements for the securement and restraint devices themselves. This notice did not, however, propose to require a restraining barrier forward of wheelchair securement locations. I am enclosing a copy of the notice for your information. I hope you find this information helpful. If you have any other questions, please contact Mary Versailles of my staff at this address or by phone at (202) 366-2992. |
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ID: nht92-8.24OpenDATE: March 16, 1992 EST FROM: Paul Jackson Rice -- Chief Counsel, NHTSA TO: Douglas Kubehl -- Safety Engineering Associates, Inc. TITLE: None ATTACHMT: Attached to letter dated 2/4/92 from Douglas Kubehl to Paul Jackson Rice (OCC 6978) TEXT: This responds to your letter of February 4, 1992, concerning the requirements of Federal motor vehicle safety standard No. 209, Seat belt assemblies. You asked for verification of your understanding of the requirements of two sections of Standard No. 209. Your discussion of these two sections and our response follows. In 209-S.4.4a(1), it is clearly stated that a loop force of 5000 pounds is required to produce a force of 2500 pounds on each structural component. However, part 209-S4.4b(4) seems to be a bit ambiguous. It states: "The length of the pelvic restraint between anchorages shall not increase more than 20 inches or 50 centimeters when subjected to a force of 2500 pounds". My interpretation of this statement is that one must employ a loop force of 5000 pounds to achieve 2500 pounds of force on each component, as specified in S4.4a(1). I an concerned that one could misinterpret the above statement as requiring a 2500 pound loop force, rather than the intended value of 5000 pounds. Your statements indicate a common misunderstanding of the requirements of S4.4 of Standard No. 209. A seat belt assembly would NOT be subject to the requirements of S4.4(a) AND to the requirements of S4.4(b). If the seat belt assembly is a Type 1 seat belt assembly, defined in S3 as "a lap belt for pelvic restraint," the assembly is subject to the requirements of S4.4(a). Section S4.4(a)(1) requires a Type 1 seat belt assembly loop to withstand a force of 5,000 pounds. Section S4.4(a)(2) states that the length of the assembly between the anchorages shall not increase more than 14 inches or 36 centimeters when the load required in S4.4(a)(1) is applied. If the seat belt assembly is a Type 2 seat belt assembly, defined in S3, as "a combination of pelvic and upper torso restraints," the assembly is subject to the requirements of S4.4(b). Section S4.4(b)(1) requires the pelvic portion of a Type 2 seat belt assembly to withstand a force of 2,500 pounds. Section 4.4(b)(4) states that the length of the pelvic porion of the assembly shall not increase more than 20 inches or 50 centimeters when the load required in S4.4(b)(1) is applied. Part 209-S5.3a, which addresses the performance of the belt assembly, refers to Figure 5 and requires a tensile force of 2500 pounds. It goes on to say that this force is equivalent to a 5000 pound force being applied to an assembly loop. Figure five is referred to several times throughout the passage, each reference requiring a specific force. Again, because the relationship of the tensile force to assembly loop force is not explicitly stated, we are concerned that one may mistake the tensile force to be the total loop force applied. The test procedure to determine compliance with the requirements of S4.4 of Standard No. 209 is found in S5.3 of that standard. The test procedure for seat belt assemblies subject to the requirements of S4.4(a) (a pelvic restraint) is found in S5.3(a). As you have correctly stated, a force of 2,500 pounds is applied to each component of the pelvic restraint, or a force of 5,000 pounds to the entire loop. The test procedure for seat belt assemblies subject to the requirements of S4.4(b) (a combined pelvic and upper torso restraint) is found in S5.3(b). The pelvic portion of such a seat belt assembly is tested by applying a total force of 2,500 pounds to the entire loop. I hope you find this information helpful. If you have any other questions, please contact Mary Versailles of my staff at this address or by phone at (202) 366-2992. |
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ID: nht92-8.25OpenDATE: March 16, 1992 FROM: Paul Jackson Rice -- Chief Counsel, NHTSA TO: Jeff Ruff -- Director of Fleet / Government Sales, The Braun Corporation TITLE: None ATTACHMT: Attached to letter dated 2/10/92 from Jeff Ruff to Office of the Chief Counsel, NHTSA (OCC 6977) TEXT: This responds to your letter of February 10, 1992 requesting advice regarding the location of the upper anchorage for the front passenger seat shoulder belt. By now, you should have received our reply (dated February 14, 1992) to your previous letter (dated October 30, 1991). In that letter, I explained that NHTSA will not conduct any crash testing of vehicles modified for operation by persons with disabilities while the agency reviews the petition from the Recreation Vehicle Industry Association to exclude these vehicle from the dynamic crash test requirement. Because this is now a pending rulemaking, the agency cannot discuss what requirements the agency will propose for these vehicles prior to the publication of the notice of proposed rulemaking (NPRM). However, as explained in our previous letter, NHTSA is aware of the need of manufacturers such as yourself and your customers to have this matter addressed as soon as possible. Therefore, the agency is proceeding with preparation and publication of the NPRM as quickly as possible. I hope you find this information helpful. If you have any other questions, please contact Mary Versailles of my staff at this address or by phone at (202) 366-2992. |
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.