Texas Government Code - GOV'T § 81.024. Rules

(1) as it considers necessary, pursuant to a resolution of the board of directors of the state bar, or pursuant to a petition signed by at least 10 percent of the registered members of the state bar, prepare, propose, and adopt rules or amendments to rules for the operation, maintenance, and administration of the state bar;  and

(2) in accordance with Subchapter E-1, adopt rules, including the Texas Disciplinary Rules of Professional Conduct and the Texas Rules of Disciplinary Procedure, for the discipline of state bar members.