No person shall install any alarm equipment of any kind at the city’s police dispatch and communications center unless and until he has received the permission of the chief of police, in writing. In no event shall more than one such person be authorized to perform alarm maintenance services in the dispatch center during any fiscal year. Such authorized person shall be selected and his compensation for such services shall be established by negotiation or by bid pursuant to the City Charter. (Ord. 1813 NCS § 1 (part), 1990.)