The Federal Banking Agency Audit Act, enacted in 1978 as Public Law 95-320 and 31 U.S.C. section 714 establish that the Board of Governors of the Federal Reserve System and the Federal Reserve banks may be audited by the Government Accountability Office (GAO).[40] The GAO has authority to audit check-processing, currency storage and shipments, and some regulatory and bank examination functions, however there are restrictions to what the GAO may audit. Audits of the Reserve Board and Federal Reserve banks may not include:
transactions for or with a foreign central bank or government, or nonprivate international financing organization;
deliberations, decisions, or actions on monetary policy matters;
transactions made under the direction of the Federal Open Market Committee; or
a part of a discussion or communication among or between members of the Board of Governors and officers and employees of the Federal Reserve System related to items (1), (2), or (3).
So really they can audit.......Nothing of importance.