A. A municipality may, if a satisfactory supply is not otherwise obtainable as determined, by ordinance, acquire and operate natural gas or geothermal energy facilities for the distribution of natural gas or heat.

B. A municipality owning and operating a gas utility shall measure the gas used by the person receiving the service by volume or energy content.

C. A municipality owning and operating a geothermal utility shall measure the heat used by the person receiving the service by fluid volume and temperature or energy content.