Mich. Comp. Laws § 460.3
The salary of the chairman of the commission and of each of the other members and the schedule for reimbursement of expenses shall be established annually by the legislature. The commission may appoint a secretary and the deputies, clerks, assistants, inspectors, heads of divisions, and employees necessary for the proper exercise of the powers and duties of the commission. All salaries and other expenses incurred by the commission shall be paid out of funds appropriated by the legislature. All fees and other moneys received by the commission shall be paid over at the end of each month to the state treasurer, taking a receipt therefor. The commission may employ engineers and experts in public utilities and public service matters and fix their compensation for services, which may be paid out of the appropriation provided by the legislature. The engineers, inspectors, and employees shall be entitled to their actual and necessary expenses incurred in the performance of the work of the commission pursuant to the schedule established by the legislature. Each deputy, clerk, assistant, engineer, inspector, or expert shall perform the duties required by the commission. Each member of the commission shall devote his entire time to the performance of the duties of his office.
MCL 460.3