17 C.F.R. § 201.1106 Right to challenge.
Title 17 - Commodity and Securities Exchanges
Other than in connection with the opportunity to submit comments as provided in §201.1103, no person shall be granted leave to intervene or to participate or otherwise to appear in any agency proceeding or otherwise to challenge an order of disgorgement or creation of a Fair Fund; or an order approving, approving with modifications, or disapproving a plan of disgorgement or a Fair Fund plan; or any determination relating to a plan based solely upon that person's eligibility or potential eligibility to participate in a fund or based upon any private right of action such person may have against any person who is also a respondent in the proceeding.
Title 17: Commodity and Securities Exchanges
PART 201—RULES OF PRACTICE
Subpart F—Fair Fund and Disgorgement Plans
§ 201.1106 Right to challenge.

