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: nht72-5.12OpenDATE: 02/14/72 FROM: AUTHOR UNAVAILABLE; Richard B. Dyson; NHTSA TO: City of Lynchburg TITLE: FMVSR INTERPRETATION TEXT: This is in reply to your letters of December 20, 1971, and January 4, 1972, concerning dump trucks recently purchased by the city of Lynchburg. You state that the trucks have a 24,000 GVW rating (rear axle 17,500 pounds, front axle 7,000 pounds), and were delivered with 8.25-20 tires, and ask whether there is a Federal requirement that restricts GVW rating according to tire size. Beginning January 1, 1972, Federal regulations (49 CFR Parts 567, 568) have required all motor vehicle manufacturers to affix a label to their vehicles that contains both a gross vehicle weight rating (GVWR) and a gross axle weight rating for each axle (GAWR). These ratings are to be established by the manufacturer based upon all vehicle systems including tires. The requirements apply to the manufacturer, however, and not to the purchaser, if the vehicle is completed when he receives it. Nor is the regulation designed to regulate vehicles-in-use, which are subject to State regulation, but it is possible that some States may use these figures as a basis of determining whether vehicles are overloaded. With reference to your particular trucks, it appears that they were manufactured before January 1, 1972, and the regulations are therefore not applicable to them. However, according to the 1971 Tire and Rim Association Yearbook, which sets recommended load and inflation pressures for all vehicle tires, the 8.25-20 10-ply tire has a recommended maximum load, for dual usage, of 3,550 pounds at 75 psi. Assuming 4 tires on the rear axle, this would be equal to a load rating of 14,200 pounds, lower than the 17,500 pounds at which the axle is rated. For single usage, the tire is rated at 4,050 pounds at 85 psi. Assuming 2 tires on the front axle, the maximum load for the axle would be 8,100 pounds, which, unlike the rear axle, is greater than the load rated for the axles. A copy of our Certification regulations, which contain the requirements for GVWR and GAWR is enclosed for your information. |
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ID: nht89-1.10OpenTYPE: INTERPRETATION-NHTSA DATE: 01/30/89 FROM: WILLIAM D. FALCON, PROGRAM MANAGER TO: RALPH HITCHCOCK -- NHTSA DIRECTOR, OFFICE OF VEHICLE SAFETY STANDARDS TITLE: NONE ATTACHMT: ATTACHED TO LETTER DATED 05/31/90 FROM STEPHEN P. WOOD -- NHTSA TO WILLIAM D. FALCON; REDBOOK A35; STANDARD 201; 202; 205; VSA 108[A][2][A]; LETTER FROM STEVE CROWELL; DATED 11/02/88 EST; LETTER FROM STEVEN CROWELL DATED 06/02/88 TO ELIZABETH D ENNISTON -- EGOH BITTNER COMMISSIONER WALTHAM MASSACHUSETTS TEXT: I am enclosing two letters received in June and November 1988 by the Commission from Mr. Steven Crowell. Citing federal legislation and correspondence from NHTSA, he is suggesting, on page 2 of his November letter, that the Commission amend the commenta ry to one of its law enforcement standards--specifically, the commentary to Standard 71.4.1 (enclosed), which states that vehicles used for transporting prisoners should have the driver separated from the prisoner by a safety barrier. Mr. Crowell recommends that, rather than stating that the barrier may be made of wire mesh or heavy gauge plastic, the commentary should specify that the barrier be one bearing a label or tag certifying the barrier's compliance with all applicable safety standards and requirements established by the Federal Motor Vehicle Safety Act of 1966. To support his recommendation, Mr. Crowell cites several sections of the Act (pages 1-2 of the June letter and page 2 of November's) and quotes from the 1985 letter he received from the chief counsel "for the United States Department of Transportation Na tional Highway Traffic Safety Administration, Jeffrey R. Miller" (page 1 of the November letter). I would very much appreciate an answer to this question: Does the Federal Motor Vehicle Safety Act of 1966 or any other legislation or regulation require or recommend that interior vehicle safety barriers--whether installed by the vehicle's manufacturer or by someone subsequent to the vehicle's first sale--be certified that they comply with all applicable federal motor vehicle safety standards and, if so, where, if any place, must the certification appear (on the barriers or somewhere else on the vehicl es)? Any other comments that you may have would be most welcome, too. We are most appreciative of your help. Please feel free to contact me if you have questions. (Abrochure describing the Commission is also enclosed.) |
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ID: nht89-1.48OpenTYPE: INTERPRETATION-NHTSA DATE: 03/22/89 FROM: SAMUEL KIMMELMAN -- PRODUCT ENGINEERING MANAGER PARKER HANNIFIN CORP TO: TAYLOR VINSON -- LEGAL COUNCIL FMVSS-108 NHTSA U.S. DEPARTMENT OF TRANSPORTATION TITLE: NONE ATTACHMT: ATTACHED TO LETTER DATED 11/01/89 FROM STEPHEN P. WOOD -- NHTSA TO SAMUAL KIMMELMAN -- PARKER HANNAFIN; REDBOOK A34; STANDARD 108 TEXT: Dear Mr. Vinson: It is our understanding that FMVSS-108 allows vehicles with combined function rear stop and turn signal/hazard lamps to operate in either of two modes when both the hazard switch and brake switch have been actuated. 1. The hazard switch is the major control for operation of the combined rear stop and turn signal/hazard lamps. a. Actuating the hazard switch some period of time after actuation of the brake switch will cause the rear lamps to change from steady on, stop signal, to flashing, hazard signal. b. Actuating the brake switch some period of time after actuation of the hazard switch will not change the flashing lamps, hazard signal, to steady on, stop signal. 2. The brake switch is the major control for operation of the combined rear stop and turn signal/hazard lamps. a. Actuating the brake switch some period of time after actuation of the hazard switch will cause the rear lamps to change from flashing, hazard signal, to steady on, stop signal. The front flashing hazard lamps will also become steady on. b. Actuating the hazard switch some period of time after actuation of the brake switch will not change the rear steady on lamps, stop signal, to flashing, hazard, while the front hazard lamps go from off to steady on. Is our interpretation of what is allowed by FMVSS-108 regarding the operation of vehicles with combined function rear stop and turn signal/hazard lamps upon actuation of both the hazard and brake switces correct? If our interpretation of FMVSS-108 is correct, is NHTSA presently considering a NPRM to specify a specific signal from the combined function rear stop and turn signal/hazard lamps when both the hazard and brake switches are actuated? Sincerely, |
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ID: nht93-5.14OpenTYPE: Interpretation-NHTSA DATE: July 8, 1993 FROM: Durin B. Rogers -- Legal Assistant, Saperston & Day TO: John Womack -- Acting Chief Counsel, NHTSA TITLE: None ATTACHMT: Attached to letter dated 8/18/93 from John Womack to Durin B. Rogers (A41; Std. 205; VSA 103(d); Redbook 4); Also attached to letter dated 7/1/91 from Paul Jackson Rice to Richard E. Wright (Std. 205); Also attached to letter dated 11/29/84 from Frank Berndt to Wayne Ivie (Std. 205) TEXT: I am writing to request your assistance with regard to a legal matter within our office at this time. According to Title 49 of the Code of Federal Regulations S571.205 (otherwise known as Federal Motor Vehicle Safety Standard 205, Glazing Materials), certain motor vehicles operating on land highways are required to use windows made of treated "safety glass" or tempered glass to reduce the likelihood of shattering, as well as to minimize the possibility of vehicle occupants being thrown through a window during a collision. More specifically, I am interested in the glazing material requirements for side windows in what are known as "fifth wheel campers/trailers." Although Section 5.1.1 of Standard #205 designates that such requirements should conform to the American National Standard Safety Code for safety glazing materials for motor vehicles operating on land highways (Z-26.1, 1977, January 26, 1977, as supplemented by Z-26.1(a), July 3, 1980), it fails to specify what grade or specification of glass is required for each window's location. For your information, the replacement side window was allegedly purchased from a manufacturer in Indiana in June 1987, and installed within a fifth wheel camper registered in the State of New York. Enclosed, for your reference, are copies of photographs of the subject camper. Would you please research this issue and confirm what specific glazing requirements, if any, are applicable to side windows within fifth wheel vehicles, and whether any federal or industrial regulations exist which would require future window replacements and/or repairs to be made of such glass? Thank you for your assistance in this matter. Attachment (Photos omitted) |
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ID: nht78-2.48OpenDATE: 05/23/78 FROM: AUTHOR UNAVAILABLE; J. J. Levin, Jr.; NHTSA TO: The Johnson Manufacturing Co. TITLE: FMVSS INTERPRETATION TEXT: This responds to Johnson Manufacturing's May 4, 1978 request for confirmation that the requirement in Standard No. 121, Air Brake Systems, that reservoirs "withstand" specific pressure does not require testing of a multi-compartment reservoir compartment-by-compartment. Your understanding of the "withstanding" requirement in S5.1.2.2 and S5.2.1.3 is correct. Although the agency sought to clarify that compartment-by-compartment testing was the proper interpretation of this requirement (42 FR 64630; December 27, 1977), problems with the interpretation resulted in its withdrawal (43 FR 9149; March 6, 1978) and adherence to the existing interpretation that there be no rupture or permanent circumferential deformation of the reservoir. Under this interpretation only the circumference of the outer reservoir shell is measured, and internal baffles are not stressed by separate compartment-by-compartment testing. |
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ID: 12311.ztvOpen Mr. Craig Homberg Dear Mr. Homberg: This responds to your letter of August 2, 1996, to the former Chief Counsel, Samuel Dubbin, asking for suggestions as to where Aquatech might locate the rear identification lamps on a vehicle that it manufactures. These lamps "are obstructed by a vacuum boom." The lamps cannot be mounted on the boom because it "articulates side to side and extends and retracts." You have enclosed a two-dimensional drawing showing the vehicle from the rear. Table II of Motor Vehicle Safety Standard No. 108 requires rear identification lamps to be "3 lamps as close as practicable to the top of the vehicle, as close as practicable to the vertical centerline, with lamp centers spaced not less than 6 inches or more than 12 inches apart." Table II does not establish either a minimum or maximum mounting height for these lamps. The agency realizes that, with some vehicle configurations, the highest practicable location may be approximately the same level as stop and taillamps, such as the frame rail, and the agency has accepted this. Some manufacturers have also added equipment to the vehicle at this level to accommodate identification lamps. The two-dimensional drawing you enclosed shows a horizontal structure below the boom and above the rear axle, where it might be possible to add identification lamps. However, the drawing is two-dimensional and it is not possible for us to assess the dimensional relationship between the horizontal structure and the vertical piece that, in the picture, bisects the lower half of the horizontal structure. If it is not practicable to add identification lamps on the horizontal structure below the boom and above the rear axle, we would be pleased to advise you further if you would send us a photograph or drawing of the rear that shows the dimensional relationships of the equipment already located there. If you have any further questions, you may call Taylor Vinson of this Office (202-366-5263). Sincerely, John Womack Acting Chief Counsel ref:108 d:9/6/96 |
1996 |
ID: ntea.ztvOpenMr. Michael E. Kastner Dear Mr. Kastner: This is in reply to your letter of October 2, 2002, requesting an interpretation of several provisions of the "early warning reporting" final rule (49 CFR Part 579, Subpart C). You asked three sets of questions. The first of these was:
Under the Vehicle Safety Act, a manufacturer of "bodies and equipment" is a manufacturer of "motor vehicle equipment." The bodies and equipment manufactured by NTEA members are "original equipment" because they are equipment installed on a motor vehicle at the time it is delivered to its first purchaser. (This answer assumes that the "bodies and equipment" are installed on a chassis by a third person.) The only early warning reporting requirements of Part 579 that apply to manufacturers of original equipment (other than tires) are the limited reporting requirements of 49 CFR 579.27.The one-time historical report established by Section 579.28(c) is required only of manufacturers "covered by Sections 579.21 through 579.26 of this part."This does not include manufacturers covered by Section 579.27, such as manufacturers of original equipment. If an NTEA member that is a manufacturer of original equipment receives a claim or notice of an incident involving death, the claim or notice need not be reported if it does not identify the equipment with "minimal specificity" (Section 579.28(d)). For bodies and other equipment, "minimal specificity" (as defined in Section 579.4(c)) amounts to the name of the manufacturer (and if there is a model or family of models identified on the item of equipment, the model name or model number). Even if the equipment is identified with minimal specificity, the claim or notice need not be reported if the identified equipment was manufactured prior to four calendar years before the reporting period (Section 579.27(b)). In sum, it appears to us that NTEA members who are solely manufacturers of original equipment will have very limited reporting responsibilities under the early warning reporting rule. NTEAs second question was as follows:
In the example you give, the body manufacturer is subject to the reporting provisions of Section 579.27. This section requires reporting only of information regarding claims and notices of incidents involving deaths. There is no requirement that the body manufacturer report warranty claims to NHTSA, even if it receives them. However, the entity that you have characterized as the "distributor" would be a vehicle manufacturer under our statute and thus would have to submit warranty data if it produced 500 or more vehicles of a given category per year. It is possible that such claims may also be reported by the chassis manufacturer (although it probably would not have to do so), but our screeners will be able to adjust to avoid double counting. NTEAs third question was as follows:
The body manufacturer must submit reports as both an equipment manufacturer and a motor vehicle manufacturer when circumstances dictate. However, as discussed above, only the limited reporting requirements of Section 579.27 apply to manufacturers of bodies furnished to persons who become the final stage manufacturer. If the body manufacturer becomes a final stage manufacturer of less than 500 vehicles annually, the limited reporting requirements of Section 579.27 will also apply. Each claim or notice of a death it receives as a body manufacturer and as a vehicle manufacturer must be reported separately. If the body manufacturer is the final stage manufacturer of 500 or more of any category of vehicles annually (e.g., medium heavy vehicle), it must furnish full reports as specified in the sections that apply to the type of vehicle completed. If you have further questions, you may call Taylor Vinson of this Office (202-366-5263). Sincerely, Jacqueline Glassman ref:579 |
2003 |
ID: volvov70.crsOpenMr. William Shapiro Dear Mr. Shapiro: This responds to your letter of January 6, 2000, requesting the National Highway Traffic Safety Administration (NHTSA) to approve an alternate location for placement of the certification label on vehicles within a new, early 2001 model year passenger car line, to be designated as the "Volvo V70," that Volvo plans to begin offering for sale on or about March 15, 2000. NHTSA's regulations at 49 CFR 567.4(c) prescribe specific locations for the installation of vehicle certification labels, and provide that if none of those locations are practicable, the manufacturer may suggest an alternate location for the agency's approval. As identified in your letter, and in an accompanying drawing, the alternate location for which you have requested approval is on the vehicle's B-pillar, facing the door opening of the rear door on the driver's side. You note that by letter dated April 29, 1998, NHTSA approved this same location for the placement of the certification label on vehicles within the Volvo S80 line. You state that the new Volvo V70 shares with the S80 many safety features that involve structural design, and has the same basic vehicle platform as the S80. Your letter states that it is not possible for the certification label to be placed in any of the locations specified in 49 CFR 567.4(c) owing to the size of the label, the corresponding surface geometry of each of those locations, and adhesion difficulties owing to the surface properties at some of those locations. You state that the alternate location that Volvo has proposed will meet the requirements of 49 CFR 567.4(c) because it is in "the same general area" as the locations specified in that section, and because a label in the proposed location will be "easily readable without moving any part of the vehicle except an outer door." In specifying locations for the placement of vehicle certification labels, NHTSA's objective is to ensure that those labels may be easily read. The location that you have proposed for vehicles in the new V70 passenger car line would meet this objective. NHTSA therefore approves your request. If you have any further questions regarding vehicle certification requirements, feel free to contact Coleman Sachs of my staff at 202-366-5238. Sincerely, |
2000 |
ID: hatlerOpen
Via Federal Express
Ms. Patricia R. Hatler Chief Legal and Governance Officer Nationwide One Nationwide Plaza Columbus, OH 43215
Dear Ms. Hatler:
We have received reports that certain insurance companies may be engaging in transactions that violate Federal odometer disclosure law with respect to vehicles damaged in Hurricane Sandy. Although we are not asserting that your company is engaging in such practices, we are writing to a number of auto insurance companies to remind them of the Federal odometer disclosure law requirements and ask them to review their practices regarding odometer disclosures. These letters do not accuse your company, or any other company, of violating the law.
We understand that when a flood-damaged vehicle is declared a total loss, the insurance company pays the insured the value of the vehicle, becomes the owner, and acquires control over the vehicle from the insured. However the reports we have received indicate that instead of completing the required odometer disclosure, some companies ask the insured to complete the odometer disclosure statement without listing the insurance company as the transferee. According to these reports, the insurance company will not sign the title, make an odometer disclosure, or transfer title. The insurance company then sells the vehicle at auction, keeps the proceeds from the auction, and provides the title with the odometer disclosure statement as signed by the insured to the auction buyer. The next person in the chain of title of the vehicle will be the buyer at auction. The insurance company will essentially be omitted from the chain of title.
In the circumstance described above, an insurance company is considered a transferee when it pays the insureds claim (in return it obtains ownership of the vehicle), and a transferor when it sells the vehicle at auction. See 49 C.F.R. 580.3. As a transferor, the insurance company is required to make certain disclosures.
Under federal odometer disclosure law, 49 U.S.C. 32705, a person transferring ownership of a motor vehicle shall give the transferee written disclosure of the cumulative mileage registered on the odometer. More specifically, under 49 C.F.R. 580.5, each transferor shall disclose the mileage to the transferee in writing on the title or on the document being used to reassign the title [t]his written disclosure must be signed by the transferor, including the printed name. The transferee must sign the disclosure statement, print his name, and return a copy to his transferor.
If you have any questions, please do not hesitate to contact Marie Choi of my staff at (202) 366-1738 or via email at marie.choi@dot.gov.
Sincerely,
O. Kevin Vincent Chief Counsel
d: 12/20/12
Identical letters sent to:
Mr. Dana Proulx General Counsel GEICO Corporation One Geico Plaza Washington, DC 20076
Mr. Charles E. Jarrett Chief Legal Officer The Progressive Corporation 300 North Commons Blvd., OHF 11 Mayfield Village, OH 44143
Mr. Christopher C. Mansfield General Counsel Liberty Mutual Group 175 Berkeley Street Boston, MA 02117
Ms. Susan L. Lees General Counsel Allstate Insurance Company 3075 Sanders Road Northbrook, IL 60062
Mr. Garrett Paddor General Counsel Farmers New World Life Insurance Company 4680 Wilshire Blvd, 2nd Fl. Los Angeles, CA 90010
Mr. Steven A. Bennett General Counsel United Services Automobile Association (USAA) 9800 Fredericksburg Road San Antonio, TX 78288
Mr. Jeffrey W. Jackson General Counsel State Farm Mutual Automobile Insurance Company One State Farm Plaza Bloomington, IL 61710
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ID: jacksonOpen
Via Federal Express
Mr. Jeffrey W. Jackson General Counsel State Farm Mutual Automobile Insurance Company One State Farm Plaza Bloomington, IL 61710
Dear Mr. Jackson:
We have received reports that certain insurance companies may be engaging in transactions that violate Federal odometer disclosure law with respect to vehicles damaged in Hurricane Sandy. Although we are not asserting that your company is engaging in such practices, we are writing to a number of auto insurance companies to remind them of the Federal odometer disclosure law requirements and ask them to review their practices regarding odometer disclosures. These letters do not accuse your company, or any other company, of violating the law.
We understand that when a flood-damaged vehicle is declared a total loss, the insurance company pays the insured the value of the vehicle, becomes the owner, and acquires control over the vehicle from the insured. However the reports we have received indicate that instead of completing the required odometer disclosure, some companies ask the insured to complete the odometer disclosure statement without listing the insurance company as the transferee. According to these reports, the insurance company will not sign the title, make an odometer disclosure, or transfer title. The insurance company then sells the vehicle at auction, keeps the proceeds from the auction, and provides the title with the odometer disclosure statement as signed by the insured to the auction buyer. The next person in the chain of title of the vehicle will be the buyer at auction. The insurance company will essentially be omitted from the chain of title.
In the circumstance described above, an insurance company is considered a transferee when it pays the insureds claim (in return it obtains ownership of the vehicle), and a transferor when it sells the vehicle at auction. See 49 C.F.R. 580.3. As a transferor, the insurance company is required to make certain disclosures.
Under federal odometer disclosure law, 49 U.S.C. 32705, a person transferring ownership of a motor vehicle shall give the transferee written disclosure of the cumulative mileage registered on the odometer. More specifically, under 49 C.F.R. 580.5, each transferor shall disclose the mileage to the transferee in writing on the title or on the document being used to reassign the title [t]his written disclosure must be signed by the transferor, including the printed name. The transferee must sign the disclosure statement, print his name, and return a copy to his transferor.
If you have any questions, please do not hesitate to contact Marie Choi of my staff at (202) 366-1738 or via email at marie.choi@dot.gov.
Sincerely,
O. Kevin Vincent Chief Counsel
d: 12/20/12
Identical letters sent to:
Mr. Dana Proulx General Counsel GEICO Corporation One Geico Plaza Washington, DC 20076
Mr. Charles E. Jarrett Chief Legal Officer The Progressive Corporation 300 North Commons Blvd., OHF 11 Mayfield Village, OH 44143
Mr. Christopher C. Mansfield General Counsel Liberty Mutual Group 175 Berkeley Street Boston, MA 02117
Ms. Patricia R. Hatler Chief Legal and Governance Officer Nationwide One Nationwide Plaza Columbus, OH 43215
Ms. Susan L. Lees General Counsel Allstate Insurance Company 3075 Sanders Road Northbrook, IL 60062
Mr. Garrett Paddor General Counsel Farmers New World Life Insurance Company 4680 Wilshire Blvd, 2nd Fl. Los Angeles, CA 90010
Mr. Steven A. Bennett General Counsel United Services Automobile Association (USAA) 9800 Fredericksburg Road San Antonio, TX 78288 |
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.