26. In the case of a waterworks system, a water main used to transport drinking water from the filtration plant to a reservoir, or from a reservoir to a water distribution main, is a trunk water main.
In the case of a sewer system, an interceptor or main used to transport waste water from a branch line situated under a thoroughfare to an interceptor, or to discharge drainage water from such a sewer main into a watercourse or a retention basin, is a trunk interceptor or trunk sewer main.