Texas Transportation Code - TRANSP § 228.003. Agreements with Other Governmental Agencies

(a) The department may, with the approval of the commission, enter into an agreement with another governmental agency or entity, including a federal agency, an agency of this or another state, including the United Mexican States or a state of the United Mexican States, or a political subdivision, to independently or jointly provide services, to study the feasibility of a toll project, or to finance, construct, operate, and maintain a toll project. The department must obtain the approval of the governor to enter into an agreement with an agency of another state, the United Mexican States, or a state of the United Mexican States.

(b) If the department enters into an agreement with a private entity, including a comprehensive development agreement under Subchapter E, Chapter 223,  1 the department and the private entity may jointly enter into an agreement under Subsection (a).