Sec. 457.002. APPLICABILITY. This chapter applies only to a county containing a municipality with a population of 500,000 or more that has created a mass transit department under Chapter 453 or former Article 1118z, Revised Statutes. Added by Acts 1997, 75th Leg., ch. 165, Sec. 30.35(a), eff. Sept. 1, 1997. SUBCHAPTER B. CREATION AND ADMINISTRATION OF AUTHORITY