The General Land Office, under the direction and control of the commissioner, is the state's lead agency for initiating response to all actual or threatened unauthorized discharges of oil. In the event of an unauthorized discharge of a hazardous substance, nothing in this chapter shall preclude the Texas Commission on Environmental Quality from at the earliest time practicable assuming response and cleanup duties pursuant to Subchapter G, Chapter 26, Water Code.
Tex. Nat. Res. Code § 40.005