96. Despite section 54 of this Regulation, the limits of the inner protection zone of a category 1 or 2 groundwater withdrawal site used since the coming into force of the Groundwater Catchment Regulation (chapter Q-2, r. 6), namely 15 June 2002, may be set less than 30 m from the withdrawal site given obstacles present, such as the size of the land, a road or a dwelling.