A member who has a personal or private interest in any measure or bill, proposed, or pending before the Legislature, shall disclose that fact, to the house of which he is member, and shall not vote thereon.
Tex. Const. art. 3, § 22, under Legislative Department.
Tex. Const. art. 3, § 22
DISCLOSURE OF PERSONAL OR PRIVATE INTEREST IN MEASURE OR BILL; NOT TO VOTE
A member who has a personal or private interest in any measure or bill, proposed, or pending before the Legislature, shall disclose that fact, to the house of which he is member, and shall not vote thereon.