6. A municipality, a community, a department, a public agency or an agency providing public services may carry out repair works or widening of public roads, or improve or install sewer and water systems, or provide public utility services, without permission from the Commission de protection du territoire agricole, in the following cases:
(1) where the works result in enlarging the existing right of way of a public road to a maximum width of 30 m, including the present right of way, and where the additional area required for the works is contiguous to the existing right of way;
(2) where the repair or installation of public services or public utility services is carried out in a right of way having a maximum width of 30 m, as described in paragraph 1;
(3) where the repair or installation of public services or public utility services is intended to serve an existing or authorized building or one that could be erected without authorization, if the services are installed on the same lot as the building to be served.