Section 7
SEC. 7. Upon the complaint of any interested person or upon his own initiatives, the Secretary of Labor or his representatives shall investigate any violation of the terms of an apprenticeship agreement made under this Act, and for such purpose he shall hold hearings, inquiries, and other proceedings necessary to such investigations and determinations and issue subpoena and subpoena duces tecum. The parties to such agreement shall, upon reasonable notice thereof, be given a fair and impartial hearing. All such hearings, investigations and determinations shall be made pursuant to such rules and procedures as may be prescribed by the Department of Labor.