Mich. Comp. Laws § 35.26

Sec. 6. In cases where moneys have heretofore been raised by any city or township under the provisions of the acts hereinafter repealed, the balance of such moneys unexpended on the first day of April, 1900, may, by vote of the common council or township board, be transmitted to, and made a part of the general fund of such city or township, as the case may be.