The provisions of Part 7900 of this subchapter shall be effective immediately upon the issuance by the Commissioner of the State Energy Office of an implementing order pursuant to section 7900.2(b) of this Subchapter, or upon any other date specified by the commissioner in the implementing order. Each prime supplier which has been served with an implementing order shall comply with the provisions of Part 7900 of this subchapter, and the provisions of any implementing order or order amending an implementing order issued by the commissioner.