The requirements under this part are subject to the exclusive regulatory enforcement of—

(a) The Federal functional regulators, with respect to the designated payment systems and participants therein that are subject to the respective jurisdiction of such regulators under section 505(a) of the Gramm-Leach-Bliley Act (15 U.S.C. 6805(a)) and section 5g of the Commodity Exchange Act (7 U.S.C. 7b-2); and

(b) The Federal Trade Commission, with respect to designated payment systems and participants therein not otherwise subject to the jurisdiction of any Federal functional regulators (including the Commission) as described in paragraph (a) of this section.