The authority shall establish a school loan revolving fund and shall establish accounts and subaccounts with the school loan revolving fund as it determines is necessary or appropriate to operate the school loan revolving fund. The authority may fund the school loan revolving fund with proceeds of bonds or notes issued by the authority, revenues of the authority, contributions from this state including contributions resulting from the assignment of the right to receive loan repayments on qualified loans made or authorized by this state under a school loan act, or repayments of loans made from the school loan revolving fund. Funds deposited in the school loan revolving fund may be used only by the authority to make qualified loans to school districts at the times and in the amounts approved by this state under the provisions of a school loan act, for the purpose of funding a reserve fund established by the authority, for the purpose of securing bonds or notes issued by the authority to provide funds for the school loan revolving fund, for the purpose of acting as a surety for the payment of bonds or notes that provide direct or indirect state sponsorship or support to a school district, and for the purpose of paying the costs of the authority to administer the fund. Loans to school districts from the school loan revolving fund with respect to qualified bonds as defined in a school loan act shall be treated as state loans as described in section 16 of article IX of the state constitution of 1963.