(a) In cooperation with the National Park Service, the commission shall administer and coordinate the efforts of state and local public and private entities in this state regarding the preservation of El Camino Real de los Tejas National Historic Trail.
(b) The commission shall develop educational and interpretative programs relating to El Camino Real de los Tejas National Historic Trail.

(c) The commission shall cooperate with the Texas Department of Transportation to designate, interpret, and market the El Camino Real de los Tejas National Historic Trail as a Texas historic highway.
(d) To supplement revenue available for the purposes under Subsection (c), the commission and the Texas Department of Transportation may pursue federal funds dedicated to highway enhancement.
(e) A designation of the El Camino Real de los Tejas National Historic Trail as a Texas historic highway may not be construed as a designation under the National Historic Preservation Act (16 U.S.C. § 470 et seq.).
(f) The Texas Department of Transportation is not required to design, construct, or erect a marker under this section unless a grant or donation of funds is made to the department to cover the cost of the design, construction, and erection of the marker. Money received to cover the cost of the marker shall be deposited to the credit of the state highway fund.