The Department of Labor and Industry, hereinafter referred to as the Department, is continued as a department of the state government; the Department shall be responsible for discharging the provisions of Title 40.1. All powers and duties conferred and imposed on the Bureau of Labor and Industry by any other law are hereby conferred upon and vested in the Department of Labor and Industry. The Department shall be responsible for administering and enforcing occupational safety and occupational health activities as required by the Federal Occupational Safety and Health Act of 1970 (P.L. 91-596), in accordance with the state plan for enforcement of that act; however, nothing in the occupational safety and health provisions of this title or regulations adopted hereunder shall apply to working conditions of employees or duties of employers with respect to which the Federal Occupational Safety and Health Act of 1970 does not apply by virtue of § 4(b)(1) of the federal act.