43 Tex. Admin. Code § 2.301
This subchapter contains the Memorandum of Understanding (MOU) between the Texas Department of Transportation (TxDOT) and the Texas Commission on Environmental Quality (TCEQ) concerning the review of the potential environmental effect of transportation projects as required by Transportation Code, § 201.607. The MOU does not affect coordination or permits required by other state or federal laws; however, as set forth in this MOU, TxDOT may elect to coordinate with TCEQ under this MOU concerning transportation projects that this MOU does not require to be coordinated. The purpose of this MOU is to provide a formal mechanism by which TCEQ reviews transportation projects that have the potential to affect resources within TCEQ's jurisdiction. This MOU also promotes the mutually beneficial sharing of information between TxDOT and TCEQ, which will assist TxDOT in making environmentally sound decisions.
43 Tex. Admin. Code § 2.301