(c) Lots of an area greater than 4,000 mé (43,057.05 sq. ft.) may be developed to a maximum floor area ratio of 1.9. USABLE OPEN SPACE: A minimum of 40 percent of each lot, excluding any portion of the lot used for parking and vehicular circulation, shall be usable open space. LOT COVERAGE: (a) Maximum tot coverage on lots less than 1,700 m@ (18,299.24 sq. ft.) in area shall be 55 percent. Maximum lot coverage on lots having an area 1,700 m2 (18,299.24 sq.» ft.) or greater shall be 45 percent, provided that where a building on a lot exceeds six storeys in height, maximum lot coverage on that lof shall be 35 percent. FRONT YARD: (a) On lots of an area of 1,700 m2 (18,299.24 sq. ft.) or less, a front yard is required of not less than 7.5 m@ (24.60 f+.) In depth. (b) On lots having an area greater than 1,700 m2 (18,299.24 sq. ft.) a front yard is required in accordance with the following table: Width of Building Required Back as percent of Lot Width Yard Depth over 50% ight build 41% to 50% ight build 31% to 40% x height build 20% to 30% x height build less than 20% x height build provided that in no case shall the front yard be less than 7.5 m (24.6 ft.) in depth.