USPS Subpoena Authority Act

This bill expands the U.S. Postal Service's (USPS) subpoena authority for investigations into specific violations. It allows the Postmaster General to issue subpoenas requiring production of records and testimony related to "covered offenses," including postal law violations, mail-related crimes under Title 18, certain federal laws, and mail-related drug offenses under the Controlled Substances Act. Subpoenas can demand records (like documents or evidence) and testimony from custodians about those records' authenticity, though they cannot require testimony in investigations under section 3005(a). The bill also restricts approval of subpoenas to the General Counsel, a Deputy General Counsel, or the Chief Postal Inspector.