18 C.F.R. § 46.4
A person must file with the Secretary of the Commission a statement in accordance with § 46.6, and in the form specified in § 131.31 of this chapter (except that with respect to calendar year 1980, no filings in the form specified in § 131.31 is required if such person has previously filed the statement required for calendar year 1980 in a different form than specified in § 131.31), if such person:
[45 FR 23418, Apr. 7, 1980, as amended by Order 140, 46 FR 22181, Apr. 16, 1981; Order 737, 75 FR 43404, July 26, 2010]