(b)
a surface abutting the end of the strip associated with runway approach 29 consisting of inclined plane having a ratio of one (1) metre measured vertically to fifty (50) metres 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 southeastern extremity of said outer surface, thence said approach surface shall slope upward at the above specified slope of one (1) metre measured vertically to fifty (50) metres measured horizontally rising to an imaginary horizontal line drawn at right angles to the projected centre line of the strip and distant fifteen thousand (15 000) metres measured horizontally from the end of the strip, the outer ends of the imaginary horizontal line being two thousand four hundred and seventy-five (2 475) metres from the projected centre line; said imaginary horizontal line being two hundred and seventy-one (271) metres, measured vertically, above the assigned elevation of the airport reference point; and
