17 CFR § 201.100 - Scope of the rules of practice.
(a) Unless provided otherwise, these Rules of Practice govern proceedings before the Commission under the statutes that it administers.
(b) These rules do not apply to:
(1) Investigations, except where made specifically applicable by the Rules Relating to Investigations, part 203 of this chapter; or
(2) Actions taken by the duty officer pursuant to delegated authority under 17 CFR 200.43.
(3) Initiation of proceedings for SRO proposed rule changes under 17 CFR 201.700-701, except where made specifically applicable therein.
(c) The Commission, upon its determination that to do so would serve the interests of justice and not result in prejudice to the parties to the proceeding, may by order direct, in a particular proceeding, that an alternative procedure shall apply or that compliance with an otherwise applicable rule is unnecessary.