(1) do not constitute a debt, moral obligation, or liability of the state, or of any county, city, town, school district, or any other political subdivision of the state;
(2) do not constitute the loan of credit of the state or of any county, city, town, school district, or any other political subdivision of the state; and
(3) may not be paid from funds other than loan payments or lease revenues received from a charter school or other funds pledged by a charter school.