1042.09 LICENSED PLUMBER REQUIRED TO INSTALL, ALTER OR REPAIR PIPE, PLUMBING OR FIXTURE CONNECTED TO COMMERCIAL MAIN.
   (a)   No person other than a duly licensed plumber shall install, alter or repair any pipe, plumbing or fixture connected to, or tapped from, any commercial main of the City.
   (b)   Subsection (a) hereof shall not apply to an owner of property performing work on such property.