12.1. Where a distribution system of a municipality also supplies water to another distribution system, serving less than 500 persons and whose person in charge is not a municipality, the obligations in sections 11, 14.1, 18, 21, 39 and 40 are incumbent on that municipality for the whole system as long as they are interconnected.
It is also incumbent on the municipality, if the analyses made show the presence of Escherichia coli bacteria in the water, to notify the person in charge of that other system. It is incumbent on the person in charge of the distribution system that is thus supplied by a distribution system of a municipality to notify the users concerned in accordance with the requirements of section 36 and to take the corrective measures to remedy the situation. For that purpose, the person in charge of such a distribution system must provide the person in charge of the supplying distribution system with the contact information where the person in charge may be reached or the contact information of a qualified person designated by the person in charge.
In addition, it is incumbent on the person in charge of the distribution system, that is thus supplied by a distribution system of a municipality, to make sampling points that comply with the provisions of this Regulation accessible to the employees or representatives of the municipality, for the purposes of the sampling of the water supplied.
For the purposes of the first paragraph, the number of users of the distribution system thus supplied is added to the number of users of the supplying distribution system.