The commissioner shall approve vouchers in payment of expenses incurred by a member in the discharge of his or her duties, to be paid out of appropriations for the department in the manner required by law. Allowance for lodging and subsistence while away from his or her official station may be paid to a member under such terms and conditions as the commissioner may prescribe, subject to collective bargaining. The commissioner may provide lodging and subsistence for a member at his or her official station. (Amended 1981, No. 91, § 19.)