Mich. Comp. Laws § 110.24: Moneys; drawing upon exhausted funds; warrants on such funds declared void.

Sec. 24.

No warrant shall be drawn upon the treasury, after the fund from which it should be paid has been exhausted; nor when the liabilities outstanding, and previously incurred and payable from such fund, are sufficient to exhaust it. Any warrant, draft or contract, payable by the provisions of this act from any particular fund, excepting bonds given for loans herein authorized and issued or made after such fund has been exhausted by previous payments or by previous liabilities payable from such fund, shall be void as against the city.