(a) Coverage provided under this chapter for necessary care and treatment in a chemical dependency treatment center must be provided as if the care and treatment were provided in a hospital.
(b) The department by rule shall adopt standards formulated and approved by the department and the Texas Commission on Alcohol and Drug Abuse for use by insurers, other third-party reimbursement sources, and chemical dependency treatment centers.

(c) Standards adopted under this section must provide for:
(1) reasonable control of costs necessary for inpatient and outpatient treatment of chemical dependency, including guidelines for treatment periods; and
(2) appropriate utilization review of treatment as well as necessary extensions of treatment.
(d) Coverage required under this chapter is subject to the standards adopted under this section.