(a) Each plumber or plumbing contractor shall, before entering upon any plumbing work subject to regulation by city laws, apply to the City Clerk for a plumber’s or plumbing contractor’s license and receive the same as hereinafter provided and have in his or her possession a valid license authorizing him, her or it to engage in the trade or occupation of a plumber or plumbing contractor in the city.
(b) No permit for any plumbing work shall be issued for any such work to be performed by a plumber or plumbing contractor, as defined, who has not first obtained a license upon making a proper application and payment of the license fee as required.
(c) It shall be unlawful for any person, firm, company, association or corporation to enter into a contract or agreement with another so as to bring himself, herself or itself under the definition of a plumber or plumbing contractor herein, or to perform any work as a plumber or plumbing contractor or any work under a contract for any work involving plumbing construction, without first having obtained a plumber’s or plumbing contractor’s license issued by the city.