(a) When the district is dissolved, the commissioners court shall provide for settlement of debts of the district, including costs and expenses of holding the dissolution election, and may levy and collect a tax on property in the district in the amount necessary to pay all valid debts and obligations of the district except district bonds.
(b) Unless district bonds are retired as provided in Section 56.299 of this code, the bonds shall be paid according to their terms by levy and collection of an annual tax.