Mich. Comp. Laws § 4.43: Lieutenant governor's absence, secretary to preside; roll call.

Sec. 3.

In case the lieutenant-governor is absent, or unable to perform the duties of his office, it shall be the duty of the secretary of the preceding senate, to call to order, and preside over the senate, until the lieutenant governor appears, or a president pro tempore is elected, and such secretary shall act as secretary of the senate until his successor is elected; and in calling the roll of the senate before the permanent organization thereof for any purpose whatever he shall call all the names appearing upon the list delivered to him by the secretary of state, as provided for in the preceding section, and he shall not call any other or different names.