(a) No person, firm, corporation or business shall install, alter, extend, replace or change any plumbing, gas or drainage piping work unless such person shall first obtain a registration from the issuing authority unless such person is the bona fide owner and occupant of a residential property.
(b) Application.
(1) Each year any person who intends to perform any of the functions set forth in subsection (a) above regarding gas piping in the city shall make application for registration to the city on a form prepared by the issuing authority.
(2) RESERVED
(3) Each applicant shall furnish a copy of his or her state plumbing contract from the department of Labor and Industry and a copy of their insurance certificate.