339. The following activities are exempted from authorization pursuant to this Division:(1) the removal of the vegetation cover over a width of no more than 5 m to allow access to the littoral zone of a lake or a watercourse, when there is no open space for such access on the lot concerned;
(1.1) the pruning of plants for the laying out of visual openings over an area of no more than 10% of the riparian portion of the lot concerned, including visual openings already on the lot;
(2) construction work on a temporary, movable or ice bridge occupying a width of no more than 10 m on the bank or shore;
(3) the construction of a boat shelter with an area of no more than 20 m2 when there is no boat shelter on the lot concerned;
(3.1) the construction of a floating quay, open pile quay or wheeled quay with an area, excluding the anchor points for a floating quay, of no more than 20 m2 in the littoral zone when there is no quay on the lot concerned;
(4) work to lay out a water crossing for fording with a width of not more than 7 m;
(5) work to install or remove fishing gear such as fish corrals and hoop nets;
(6) work to construct a structure of no more than 5 m in width to cross a watercourse, with no support or stabilization in the littoral zone;
(7) (subparagraph revoked).