Mich. Comp. Laws § 324.95108

Sec. 8. (1) After the issuance of the bonds authorized by this act, there shall be appropriated from the general fund of the state each fiscal year a sufficient amount to pay promptly, when due, the principal of and interest on all outstanding bonds authorized by this act and the costs incidental to the payment of the bonds. (2) The governor shall include the appropriation provided for in subsection (1) in his or her annual executive budget recommendations to the legislature.