(1) "Authorized person" means:

(a) An employee of a public utility which produces, transmits, or delivers electricity;

(b) An employee of a public utility which provides and the work of which relates to communication services or an employee of a state, county, or municipal agency which has authorized circuit construction on or near the poles or structures of a public utility;

(c) An employee of an industrial plant whose work relates to the electrical system of the industrial plant;

(d) An employee of a cable television or communication services company or an employee of a contractor of a cable television or communication services company if specifically authorized by the owner of any necessary poles to make cable television or communication services attachments;

(e) An employee or agent of a state, county, or municipal agency which has or the work of which relates to overhead electrical lines or circuit construction or conductors on poles or structures of any type.

(2) "High voltage" means voltage in excess of six hundred volts measured between conductors or between a conductor and the ground.

(3) "Overhead line" means all bare or insulated electrical conductors installed above the ground.

(4) "Person or business entity" means a party contracting to perform any function or activity upon any land, building, highway, or other premises.

(5) "Public utility" includes public service corporations, municipally owned electric systems, and districts subject to article XXV of the Colorado constitution.