1. Culverts that meet the following requirements are excluded from the application of section 3 of the Engineers Act (chapter I-9):(1) they are situated in a farming environment or in a forest in the private domain;
(2) they are not situated on a road open to public vehicular traffic or on any other land where such traffic is allowed;
(3) the area of the watershed upstream from them is less than 100 ha; and
(4) the width of their conduit is equal to or less than 1.2 m or, if they have several conduits, the total width does not exceed 1.2 m.