No person except a regularly licensed plumber or his or her employee shall be permitted to do any work on any pipes or connections made with the mains of or in any way connected with the water supply of the city, and no plumber shall directly or indirectly allow any other person to do any work on said appliances under his or her license. All such plumbers shall be governed by all the rules and regulations of this title, and Chapter 150, regulating plumbing and plumbers.
(Prior Code, § 10-2-21) Penalty, see § 51.99