Mich. Comp. Laws § 123.8: Liability for pro rata share of indebtedness paid.

Sec. 8.

Upon payment of any of its indebtedness existing prior to said change of boundary by any city or township, the boundary of which has been changed as provided for in this act, the remaining cities or townships, the boundaries of which have been changed by said division, shall be liable to and pay to the city or township paying any such indebtedness their pro rata share of the indebtedness so paid.