17 CFR 38.6: Enforceability.

An agreement, contract or transaction entered into on or pursuant to the rules of a designated contract market shall not be void, voidable, subject to rescission or otherwise invalidated or rendered unenforceable as a result of:

(a) A violation by the designated contract market of the provisions of section 5 of the Act or this part 38; or

(b) Any Commission proceeding to alter or supplement a rule, term or condition under section 8a(7) of the Act, to declare an emergency under section 8a(9) of the Act, or any other proceeding the effect of which is to alter, supplement, or require a designated contract market to adopt a specific term or condition, trading rule or procedure, or to take or refrain from taking a specific action.