Sewage system means the entire sewage treatment and subsurface disposal system;
Levee system means a flood protection system which consists of a levee, or levees, and associated structures, such as closure and drainage devices, which are constructed and operated in accordance with sound engineering practices.
Electric bicycle means a "class 1 electric bicycle," a "class 2 electric bicycle," or a "class 3 electric bicycle" as defined in this section.
Interstate system means the system of highways as defined in section 43-2-101 (2).
Renewable energy system means a fixture, product, device, or interacting group of fixtures, products, or devices on the customer's side of the meter that use 1 or more renewable energy resources to generate electricity. Renewable energy system includes a biomass stove but does not include an incinerator or digester.