Michigan Act 192 of 1953 serves as the document of record for counties to establish their respective departments:
The county board of commissioners may create a county department of veterans' affairs. The department shall be under the administration of a committee of 3 to 5 veterans, appointed by the county board of commissioners, who shall be residents of the county and who have served honorably on active duty in the United States armed forces or who served actively in the United States armed forces in a war or received an armed forces campaign or service medal, to be appointed upon the recommendation of the posts of each chartered veterans' organization within the county. Each member appointed shall have demonstrated knowledge, skills, and experience in public service, business, or finance. If an opening on a committee of veterans occurs, the county board of commissioners shall provide notice of that opening to 1 or more newspapers within the county and to veteran service organizations within the county. Notwithstanding the provisions of any law of this state to the contrary, a member of the board of commissioners of a county shall be eligible for appointment. Members appointed by the board of commissioners shall be appointed for a term of 4 years each. However, the terms for members first appointed shall be staggered so that not more than 2 vacancies are scheduled to occur in a single year. Vacancies shall be filled in the same manner as original appointments for the unexpired terms.
Additional information may be found at: https://www.legislature.mi.gov