Texas Local Government Code - LOC GOV'T § 331.006. Concessions

(a) The management of any park, historical museum, or historic or prehistoric site acquired under this chapter may sell or lease concessions or privileges for the establishment of amusements, stores, gasoline stations, and other concerns consistent with the operation of a public park and the preservation of noteworthy features of a historic or prehistoric site or historical museum.

(b) The proceeds of the sales and leases may be used only for the improvement and operation of the park, museum, or site. However, the proceeds of the sales or leases in connection with a municipal park may also be used for the support, maintenance, and upkeep of other municipal parks.