Tex. Gov't Code § 494.010
A rule adopted by the board that regulates the possession and use of tobacco products by department employees must provide that employees of the department are permitted to use tobacco products during work hours at times and locations designated by the board. In designating locations at which the use of tobacco products is permitted, the board shall designate locations that:
Added by Acts 1997, 75th Leg., ch. 859, Sec. 1, eff. Sept. 1, 1997.