Texas Parks and Wildlife Code - PARKS & WILD § 23.014. Reversion to State

(a) Any deed executed by the state to the United States for the creation of Padre Island National Seashore becomes null and void on the initiation by any elected or appointed agent, officer, or employee of the United States, or by any agency or department of the United States, of a suit at law or in equity in any federal court to enlarge or expand the title, right, or interest granted by the deed. When a deed becomes void under this subsection, the land immediately reverts to the state.

(b) Unless reversion is waived by the legislature during the biennium following the happening of a condition of reversion, all state-owned land conveyed to the United States for the creation of the Padre Island National Seashore reverts to the state and to the fund or account to which it belonged before conveyance if: