(a) An authority may request funds for its operation from a municipality, the commissioners court, or both a municipality and the commissioners court. The request shall be accompanied by a budget.
(b) Funds appropriated to an authority are subject to audit.

(c) Federal funds or grants may be used to offset the authority’s annual cost of debt service.
(d) An authority may accept gifts, grants, donations, receipts, or funds from any source to carry out its powers and duties under this chapter.