(a) The commission by rule shall establish a program to prevent illegal dumping that affects the surface waters of this state by placing signs on major highway water crossings that notify drivers of a toll-free number to call to report illegal dumping.
(b) The commission shall establish a toll-free number hotline that will forward calls to the appropriate law enforcement agency.

(c) A local government may work with the commission to participate in the program. A local government that participates in the program may contribute to the cost of operating the toll-free number hotline.
(d) The Texas Department of Transportation shall cooperate with the commission in the placement of signs described by Subsection (a).
(e) The Texas Department of Transportation shall post a sign that complies with program requirements at a major highway water crossing at the time a previously posted sign identifying the crossing or prohibiting dumping at the crossing is scheduled to be replaced.