Parking requirements. A minimum of 5.5 parking spaces shall be required for each 1,000 square feet of gross leasable area within the first 1,000,000 square feet of gross leasable area; 4.5 parking spaces shall be required for each 1,000 square feet of gross leasable area within the second 1,000,000 square feet of gross leasable area; and 4.0 parking spaces shall be required for each 1,000 square feet of gross leasable area in excess of 2,000,000 square feet of gross leasable area.