A person, firm, corporation, partnership, association, or cooperative who sells natural gas for irrigation may not reduce the supply of natural gas for an agricultural purpose, including irrigation pumping or crop drying, if that person or entity:

1. (1) sells and distributes natural gas in a municipality; or
2. (2) delivers gas to the boundary of a municipality for resale in the municipality.

Acts 1997, 75th Leg., ch. 166, Sec. 1, eff. Sept. 1, 1997.