Michigan Compiled Laws, Chapter 460. Public Utilities § 460.833

Sec. 33. The board of commissioners of a joint agency shall annually elect 1 of the commissioners as chairperson, another as vice-chairperson, and another person or persons, who may or may not be a commissioner, as treasurer, secretary, and if desired, assistant secretary. The office of treasurer may be held by the secretary or assistant secretary. The board of commissioners may appoint additional officers as it deems necessary. The secretary or assistant secretary of the joint agency shall keep a record of the proceedings of the joint agency, and the secretary shall be the custodian of all records, books, documents, and papers filed with the joint agency, the minutes or journal of the joint agency, and its official seal. Either the secretary or the assistant secretary of the joint agency may cause copies to be made of all minutes and other records and documents of the joint agency and may give certificates under the official seal of the joint agency to the effect that the copies are true copies, and all persons dealing with the joint agency may rely upon a certificate under the official seal of the joint agency.