The “opportunity scholarship fund” is created as a nonreverting fund in the state treasury, consisting of income from investment of the fund and any specified distributions, appropriations, gifts, grants and donations to the fund. Money in the fund is appropriated to the department for scholarship awards as provided in the Opportunity Scholarship Act. Expenditures from the fund shall be by warrant of the secretary of finance and administration pursuant to vouchers signed by the secretary of higher education or the secretary’s authorized representative.