Whenever in this chapter the words or phrases defined in this section are used, they shall have the respective meanings assigned to them in the following definitions.
(A) "Commission" means the Public Utilities Commission of the state.
(B) "Person" means individuals, firms, corporations, partnerships and their agents and employees.
(C) "Poles, overhead wires and associated overhead structures" means poles, towers, supports, wires, conductors, guys, stubs, platforms, crossarms, braces, transformers, insulators, cutouts, switches, communication circuits, appliances, attachments and appurtenances located above ground within a district and used or useful in supplying electric, communication or similar or associated service.
(D) "Underground Utility District" or "District" means that area in the city within which poles, overhead wires and associated overhead structures are prohibited as such area is described in a resolution adopted pursuant to the provisions of § 13.20.040.
(E) "Utility" includes all persons or entities supplying electric, communications or similar or associated service by means of electrical materials or devices.
(`78 Code, § 13.20.010.)