31 USC 714 - Audit of Financial Institutions Examination Council, Federal Reserve Board, Federal reserve banks, Federal Deposit Insurance Corporation, and Office of Comptroller of the Currency

(a) In this section, agency means the Financial Institutions Examination Council, the Federal Reserve Board, Federal reserve banks, the Federal Deposit Insurance Corporation, the Office of the Comptroller of the Currency, and the Office of Thrift Supervision.
(b) Under regulations of the Comptroller General, the Comptroller General shall audit an agency, but may carry out an onsite examination of an open insured bank or bank holding company only if the appropriate agency has consented in writing. Audits of the Federal Reserve Board and Federal reserve banks may not include
(1) transactions for or with a foreign central bank, government of a foreign country, or nonprivate international financing organization;
(2) deliberations, decisions, or actions on monetary policy matters, including discount window operations, reserves of member banks, securities credit, interest on deposits, and open market operations;
(3) transactions made under the direction of the Federal Open Market Committee; or
(4) 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 clauses (1)(3) of this subsection.
(c) 
(1) Except as provided in this subsection, an officer or employee of the Government Accountability Office may not disclose information identifying an open bank, an open bank holding company, or a customer of an open or closed bank or bank holding company. The Comptroller General may disclose information related to the affairs of a closed bank or closed bank holding company identifying a customer of the closed bank or closed bank holding company only if the Comptroller General believes the customer had a controlling influence in the management of the closed bank or closed bank holding company or was related to or affiliated with a person or group having a controlling influence.
(2) An officer or employee of the Office may discuss a customer, bank, or bank holding company with an official of an agency and may report an apparent criminal violation to an appropriate law enforcement authority of the United States Government or a State.
(3) This subsection does not authorize an officer or employee of an agency to withhold information from a committee of Congress authorized to have the information.
(d) 
(1) To carry out this section, all records and property of or used by an agency, including samples of reports of examinations of a bank or bank holding company the Comptroller General considers statistically meaningful and workpapers and correspondence related to the reports shall be made available to the Comptroller General. The Comptroller General shall give an agency a current list of officers and employees to whom, with proper identification, records and property may be made available, and who may make notes or copies necessary to carry out an audit.
(2) The Comptroller General shall prevent unauthorized access to records or property of or used by an agency that the Comptroller General obtains during an audit.