Maximize Your Membership. The State Bar of Texas offers services to help Texas attorneys with their law practices.We will help you find a lawyer or other resource that best matches your legal needs and financial means. Every lawyer, approved for admittance to practice law in Texas, is required to register with the State Bar of Texas. Please fill out the registration form below. Download and fill out our application. This PDF download also includes all rules and information about joining. To join a section, visit My Bar Page and join online, or download the application. Warren Harris chairs the firm's appellate practice group. He handles high-stakes appeals in Texas and across the country.