Texas Natural Resources Code - NAT RES § 53.151. Lease of Certain Areas

(1) islands, saltwater lakes, bays, inlets, marshes, and reefs owned by the state within tidewater limits;

(2) the portion of the Gulf of Mexico within the jurisdiction of the state;

(3) rivers and channels that belong to the state;

(4) all unsold surveyed and unsurveyed public school land; and

(5) all land sold with a reservation of minerals to the state under Section 51.054 or 51.086 of this code in which the state has retained leasing rights.