(a) The secretary shall enforce and administer the provisions of this act and the secretary or authorized representatives of the secretary are empowered to hold hearings and otherwise to investigate violations or alleged violations of this act.

(b) The secretary or authorized representatives of the secretary are empowered to enter such places, question such employees and investigate such facts, conditions or matters as they may deem appropriate to determine whether any person has violated any provision of this act or any rule or regulation issued hereunder or which may aid in the enforcement of the provisions of this act.

(c) The secretary or authorized representatives of the secretary shall have the power to administer oaths and examine witnesses under oath or otherwise, issue compulsory process to compel the attendance of witnesses and the production of papers, books, accounts, records, payrolls, documents and testimony relating to claims for unpaid wages, and to take depositions and affidavits in the administration of this act.

(d) In case of failure of any person to comply with any compulsory process lawfully issued, the secretary may apply to the judge of the district court for citation in contempt and such judge may punish for contempt, as in other cases of refusal to obey the orders and processes of the court.