Mich. Comp. Laws § 600.2153

Sec. 2153. Whenever any application is made to any public officer or board of officers to do any act in an official capacity, and such officer or board requires information or proof to enable him or them to decide on the propriety of doing such act, such information or proof may be required to be given by affidavit, and such officer or any member of such board, may administer all necessary oaths for that purpose.