Mich. Comp. Laws § 87.5: Aldermen; powers, duties.

Sec. 5.

The aldermen of the city shall be members of the council, and attend the meetings thereof, and act upon committees, when thereupon appointed by the mayor or council. They shall be conservators of the peace, and as such they shall aid in maintaining quiet and good order in the city, and in securing the faithful performance of duty by all officers of the city.