(a) a surface abutting the end of the strip associated with runway approach 15 consisting of an inclined plane having a ratio of one (1) foot measured vertically to forty (40) feet measured horizontally rising to an intersection with the outer surface, THENCE said approach surface shall be horizontal and contiguous to said outer surface to an intersection with the northern extremity of said outer surface, THENCE said approach surface shall slope upward at the above specified slope of one (1) foot measured vertically to forty (40) feet measured horizontally rising to an imaginary horizontal line drawn at right angles to the projected centre line of the strip and distant ten thousand (10,000) feet measured horizontally from the end of the strip, the outer ends of the imaginary horizontal line being one thousand two hundred and fifty (1,250) feet from the projected centre line; said imaginary horizontal line being one hundred and sixty-six (166) feet, measured vertically, above the Airport Reference Point, and
(b) a surface abutting the end of the strip associated with runway approach 33 consisting of an inclined plane having a ratio of one (1) foot measured vertically to forty (40) feet measured horizontally rising to an intersection with the outer surface, THENCE said approach surface shall be horizontal and contiguous to said outer surface to an intersection with the southern extremity of said outer surface, THENCE said approach surface shall slope upward at the above specified slope of one (1) foot measured vertically to forty (40) feet measured horizontally rising to an imaginary horizontal line drawn at right angles to the projected centre line of the strip and distant ten thousand (10,000) feet measured horizontally from the end of the strip, the outer ends of the imaginary horizontal line being one thousand two hundred and fifty (1,250) feet from the projected centre line; said imaginary horizontal line being one hundred and seventy-nine (179) feet, measured vertically, above the airport reference point,
