The “judge pro tempore fund” is created in the state treasury, to be administered by the administrative office of the courts. The fund shall be used to pay the costs of judges pro tempore. The fund shall consist of appropriations, gifts, grants, donations and bequests made to the fund. Income from the fund shall be credited to the fund. Payments from the judge pro tempore fund shall be made pursuant to vouchers issued and signed by the director of the administrative office of the courts or the director’s designee upon warrants drawn by the secretary of finance and administration.