The rules in this subpart apply to and govern proceedings for the promulgation of rules as provided in section 18(a)(1)(B) of the Federal Trade Commission Act. Such rules shall be known as trade regulation rules. All other rulemaking proceedings shall be governed by the rules in subpart C, except as otherwise required by law or as otherwise specified in this chapter. [46 FR 26288, May, 12, 1981, as amended at 50 FR 53303, Dec. 31, 1985]