18(2)Subject to section 16, where the water of a watercourse is classified as a class under this Regulation but it is not meeting any applicable standard for that class of water, no person shall affect or use the water, the watercourse or any area located within the boundaries of the watershed of the watercourse, whether above, on or below the earth’s surface, or cause it to be affected or used, so as to impede or stop, directly or indirectly, any progress that the quality of the water may have been making or might have made toward meeting any of the applicable standards for that class of water.