Terms used in this chapter mean:
(1) "Biogas gathering line," new and existing gathering pipeline facilities in South Dakota that transport gas from a bio-methane producer to an interstate or intrastate gas pipeline;
(2) "Commission," the Public Utilities Commission;
(3) "Gas," natural gas, liquefied natural gas, flammable gas, gas which is toxic or corrosive, or liquefied petroleum gas in distribution systems.