(a) This section applies only to a correctional facility operated by the Texas Department of Criminal Justice or operated under contract with that department.
(b) Except as provided by Subsection (c), a retail public utility may require the operator of a correctional facility that receives retail water or sewer utility service from the retail public utility to comply with water conservation measures adopted or implemented by the retail public utility.

(c) A correctional facility is not required to comply with a water conservation measure under Subsection (b) if the operator of the correctional facility submits to the retail public utility a written statement from the Texas Department of Criminal Justice that states that the measure would endanger health and safety at the facility or unreasonably increase the costs of operating the facility.
(d) If a retail public utility suspends a water conservation measure and later implements the same measure, the operator of a correctional facility that received an exemption from the original measure under Subsection (c) must submit a new written statement from the Texas Department of Criminal Justice to obtain an exemption under Subsection (c) from the newly implemented measure.