Responding to lawsuits brought by attorneys with intimate Bush family connections - with complaints coming from both the Texas General Land Office and the Texas Oil and Gas Association - the Denton attorneys have signaled the battle has only just begun in the city situated in the heart and soul of the Barnett Shale , the birthplace of fracking. In its response to the Texas Oil and Gas Association , Denton's attorneys argued the Association did not provide sufficient legal evidence that the Texas constitution demarcates the Texas Railroad Commission or the Texas Commission on Environmental Quality as the only governmental bodies that can regulate or permit fracking.