Texas Local Government Code - LOC GOV'T § 316.003. Amount of Fees

(a) Except as provided by Subsection (b), the commissioners court may not set the fees in amounts that would produce more total revenue in a year than is necessary to pay the annual expense of providing all county recreational facilities and services.

(b) The commissioners court may set the fee for admission to a county park in an amount not to exceed the maximum amount provided by law for entrance to a state park.