772.18   RULES AND REGULATIONS FOR COMPUTING REQUIRED PARKING SPACES.
   (a)   Where fractional spaces result, the parking spaces required shall be the next highest whole number.
   (b)   In the case of mixed uses, parking spaces required shall either equal the sum of the requirements of the various uses computed separately or in accordance with the shared parking agreement per Section 772.11.
   (c)   The collective provision of off-street parking areas by two or more buildings or uses on adjacent lots is permitted, provided that the total of such facilities shall not be less than the sum required of the various buildings or uses computed separately, and further provided that the land upon which the collective facilities are located is owned or leased by one or more of the collective users.
   (d)   Minimum Required Spaces. The minimum number of parking spaces required per property shall be determined by the sum of spaces required for each applicable use in ITE Parking Standards.
   (e)   Exceeding the Minimum Requirements. A parking lot that exceeds the minimum parking space requirements by more than 10% shall also increase the required interior parking lot landscaping for the entire site by 10%.
      (1)   A 15% increase in required parking may be permitted without restriction and above the set maximum if the developer constructs all additional parking spaces with pervious pavement or employs the use of best management practices (BMPs) for storm water filtration as approved by the City Engineer.