Mich. Comp. Laws § 88.3: President pro tempore; powers, duties.

Sec. 3.

On the first Monday in May in each year, the council shall appoint 1 of their number president pro tempore of the council, who, in the absence of the president, shall preside at the meetings thereof, and exercise the powers and duties of president. He shall have a vote upon all questions, but he shall have no casting vote in case of a tie. In the absence of the president and president pro tem, the council shall appoint 1 of their number to preside and for the time being he shall exercise the powers and duties of the president.