15 C.F.R. § 764.4
(a) Where to report. If a person learns that an export control violation of the EAR has occurred or may occur, that person may notify:
Office of Export Enforcement, Bureau of Industry and Security,U.S. Department of Commerce, 14th Street and Constitution Avenue, N.W., Room H-4520, Washington, D.C. 20230, Tel: (202) 482-1208, Facsimile: (202) 482-0964
or, for violations of part 760 of the EAR:
Office of Antiboycott Compliance, Bureau of Industry and Security, U.S. Department of Commerce, 14th Street and Constitution Avenue, N.W., Room H-6099C, Washington, D.C. 20230, Tel: (202) 482-2381, Facsimile: (202) 482-0913.
[61 FR 12902, Mar. 25, 1996, as amended at 70 FR 14391, Mar. 22, 2005]