Section 240(1) in Karnataka Municipal Corporations Act, 1976
(1)No person other than a licensed plumber shall execute any work connected with the corporation sewerage system and no person shall permit any such work to be executed except by a licensed plumber:Provided that if, in the opinion of the corporation Engineer, the work is of a trivial nature he may grant permission in writing for the execution of such work by a person other than a licensed plumber.