Social Security Act
Section 7. Oaths, Witnesses, and Production of Records. - When authorized by the Commission, an official or employee thereof shall have the power to administer oath and affirmation, take depositions, certify to official acts, and issue subpoena and subpoena duces tecum to compel the attendance of witnesses and the production of books, papers, correspondence and other records deemed necessary as evidence in connection with any question arising under this Act. Any case of contumacy shall be dealt with by the Commission in accordance with law.