The 'AAA' enhanced rating on Holt Public Schools, Mich.'s unlimited-tax GO refunding bonds reflects the additional security provided by the Michigan School Bond Loan Fund program. Section 16 of Article 9 of Michigan's 1963 Constitution created the Michigan School Bond Loan Fund program to provide districts access to funds to avoid a default on qualified debt. Under the program, if a school district fails to meet its debt service obligation for qualified debt, the state treasurer is notified. The treasurer pays the required debt service, and payment to bondholders is uninterrupted. If the balance in the state's loan fund is insufficient to cover obligations, the state is required to make loans from the general fund. Since the fund is an