A charge may be made in person or by mail at any office of the Commission or with any designated representative of the Commission. The addresses of the Commission's offices appear in Sec. 1610.4. [44 FR 4668, Jan. 23, 1979, as amended at 49 FR 13024, Apr. 2, 1984; 54 FR 32061, Aug. 4, 1989; 71 FR 26828, May 9, 2006]