Sec. 123.002.  EXCEPTION.  This subchapter does not apply to the extent that the supply of natural gas is required to maintain natural gas service for:
(1)  use by residential users or hospitals;  or
(2)  an analogous use that is vital to public health and safety.
Acts 1997, 75th Leg., ch. 166, Sec. 1, eff. Sept. 1, 1997.