49 CFR § 551.33
Address of communications
November 18, 2020
Unless otherwise specified, communications shall be addressed to the Administrator, National Highway Traffic Safety Administration, U.S. Department of Transportation, 400 Seventh Street SW., Washington, DC 20590. Communications may not be addressed to a staff member's private address.
[36 FR 1147, Jan. 23, 1971; 38 FR 20086, July 27, 1973]