Section 70. Procedure under sections sixty-nine to seventy-five, inclusive, and the jurisdiction of the department shall be the same as under sections one to sixty-eight, inclusive, and the commonwealth or such county, city, town or district shall have the same rights in proceedings under said sections as the insurer. The state treasurer or the treasurer or officer having similar duties of such county, city, town or district shall pay compensation awarded for injury to persons in its employment upon proper vouchers without further authority.