Mich. Comp. Laws § 47.11: Board of county auditors; members' interest in contracts prohibited.

Sec. 11.

No member of said board of auditors shall be directly or indirectly interested in any contract with said county which may involve the expenditure of any county money, or in the sale of supplies to said county, or in the performance of any paid services of said county other than the services as a member of said board.