Each State and local government submitting any application for a plan which is approved under section 8235a(a) of this title, and each public utility and person or persons entering into a contract under such a plan, shall keep such records and make such reports as the Secretary may require. The Secretary and the Comptroller General of the United States shall have access, at reasonable times and under reasonable conditions, to any books, documents, papers, records, and reports of each such State and local government, utility, and person or persons which the Secretary determines, in consultation with the Comptroller General of the United States, are pertinent to this part.