25 C.F.R. § 309.27
How are complaints filed?
Complaints about protected products alleged to be offered or displayed for sale or sold in a manner that falsely suggests they are Indian products should be made in writing and addressed to the Director, Indian Arts and Crafts Board, Room 4004-MIB, U.S. Department of the Interior, 1849 C Street, NW, Washington, DC 20240.