Tex. Parks & Wild. Code § 25.005

A district may make, grant, accept, and enter into leases, concessions, franchises, and rental, operating, and other agreements relating to the water-related park areas or their facilities that the governing body deems necessary or convenient to carry out any of the purposes and powers granted in this chapter on the terms and conditions and for the periods of time as may be prescribed. The lease, concession, franchise, or agreement may be entered into with any person.