Mich. Comp. Laws § 4.183: Sergeant at arms; traveling expenses for summoning witnesses.

Sec. 3.

The sergeant at arms of the respective branches of the legislature shall be allowed no extra compensation for services performed in subpoenaing witnesses to appear before any committee of the legislature other than the sergeant's necessary traveling expenses, which sum shall be paid in the same manner as other legislative expenses are paid, out of moneys appropriated to the legislature.