In this subchapter:
(1) "Electric utility" means:
(A) an electric cooperative organized under Chapter 161;
(B) a corporation or river authority, if the river authority is created by a statute of this state:
(i) that generates, transmits, or distributes electric energy in this state; and
(ii) whose operations are subject to the judicial and legislative processes of this state; or
(C) a municipal electric utility.
(2) "Municipal electric utility" means a municipality in this state that owns and operates an electric generating plant or that operates electric transmission lines or an electric distribution system.
(3) "Distribution line" means a power line operated below 60,000 volts when measured phase to phase.
(4) "Transmission line" means a power line operated at 60,000 volts or more when measured phase to phase.