(1) An authority formed pursuant to this part 9, referred to in this part 9 as the 'authority', shall be known as a municipal energy finance authority. Its duties shall include the financing of municipal operations for the exploration, development, and production of unconventional gas, as defined in this section, for the purposes specified in section 31-25-901.(2) For the purposes of this part 9, 'unconventional gases' means gases which are predominantly methane, not obtained from ordinary, porous sands; and which generally are said to be in tight sands and shales where permeability is low, in coal beds where pressure is low, and in geopressured sediments, or gas from all sources other than sandstone or limestone with permeability less than one millidarcy. 'Unconventional gases' also includes gases which are predominantly methane obtained from or in connection with wastewater treatment operations.L. 80: Entire part added, p. 659, § 1, effective July 1.