(a) The commission may cooperate with the United States Department of Agriculture and the county commissioners courts in a cooperative program for the eradication of tuberculosis among cattle and the establishment of areas based on prevalence of the disease.
(b) The commissioners court of each county may cooperate with the commission and the United States Department of Agriculture in a cooperative program under this chapter, but shall cooperate if presented with a petition signed by at least 75 percent of the owners of cattle in the county as shown by the county tax rolls.