30. It is prohibited to apply pesticides for agricultural purposes(1) less than 3 m from a watercourse, body of water or ditch where the total flow area (average width multiplied by average height) of the part of the watercourse or ditch is greater than 2 m2; the relative distance from a ditch is measured from its edgeline; and
(2) less than 1 m from a watercourse, including an intermittent watercourse, or a ditch having a total flow area of 2 m2 or less for the part of the watercourse or ditch; the relative distance from a watercourse is measured from the natural high-water mark of the watercourse as defined in the policy referred to in the second paragraph of section 1 and the relative distance from a ditch is measured from its edgeline.