37 Tex. Admin. Code § 259.136
All single cells, multiple occupancy cells, and dormitories shall be provided with day room space. Separation cells, violent cells, holding cells, detoxification cells, and medical cells are exempt from this requirement. Day rooms shall accommodate no more than 48 inmates. Dayrooms operated as direct supervision may accommodate more than 48 inmates but shall not exceed more than 72 inmates. Based on the design capacity of the cells served, the day rooms shall contain: not less than 40 square feet of clear floor space for the first inmate plus 18 square feet of clear floor space for each additional inmate; a sufficient number of toilets, lavatories, and showers as approved by the Commission; and mirrors, seating, and tables. A utility sink should be provided. Convenient electrical receptacles circuited with ground fault protection shall be provided. Power to receptacles should be individually controlled outside of the day room.
37 Tex. Admin. Code § 259.136