Michigan Compiled Laws, Chapter 324. Natural Resources and Environmental Protection § 324.50158

Sec. 50158. (1) A district, with the approval of the department, may create and establish 1 or more special debt service reserve funds, to secure its bonds, referred to in this part as approved reserve funds. A district shall pay into an approved reserve fund the money appropriated and made available by the state for the purpose of the fund; proceeds of the sale of bonds, to the extent provided in the resolution of the district authorizing the issuance of bonds; and other money made available for the purpose of a fund from any other source. The money held in an approved reserve fund shall be used as required by the resolution authorizing the issuance of bonds and creating the fund. Income or interest earned by, or increment to an approved reserve fund due to the investment of money in the fund may be transferred by a district to other funds or accounts of the district to the extent the transfer does not reduce the amount of an approved reserve fund below the required level for a fund, as specified in the bond authorizing resolution.

(2) An approved reserve fund requirement in the resolution of the board authorizing the bonds with respect to which the fund is established, shall not exceed the maximum amount of principal and interest maturing and becoming due in any succeeding calendar year on the bonds secured in whole or part by the fund. A district shall not issue bonds secured in whole or in part by an approved reserve fund if, upon the issuance of the bonds, the amount in the fund would be less than the requirement for the fund, unless the district at the time of issuance of the bonds, deposits in the fund from the proceeds of the bonds to be issued, or from other sources, an amount which, together with the amount then in the fund, shall be not less than the approved reserve fund requirement for the fund.