1. In this Chapter, the terms “fixture”, “back-siphonage preventer or vacuum breaker”, “backflow preventer”, “plumbing system”, “cleanout”, “water system” and “trap” have the meaning given to them by the National Plumbing Code of Canada 1995 as defined by section 3.01 of Chapter III of the Construction Code (chapter B-1.1, r. 2) made pursuant to the Building Act (chapter B-1.1) and, where applicable, amended by section 3.03 of that Chapter.