(a) Number of Spaces. When determination of the number of off-street parking spaces required by this Zoning Code results in a requirement of a fractional space, any fraction shall be rounded up and counted as one (1) parking space.
(b) Floor Area. For the purpose of determining off-street parking and off-street loading requirements, floor area shall be defined to be the sum of the gross horizontal floor areas of the building, or structure, as measured from interior of common wall to interior of common wall, which is devoted to a use requiring off-street parking or loading as provided in this Zoning Code.
(c) Collective and Shared Parking. Collective Provision. Off-street parking facilities for separate uses may be provided collectively and the total number of spaces so furnished may be reduced up to fifteen (15) percent of the spaces required for all such separate uses, and provided that all regulations covering the location of accessory parking spaces in relation to the use served are observed. A written agreement covering such collective use shall be filed with the Zoning Administrator.
(d) Employee Parking. Except where otherwise specified, parking spaces required on an employee basis shall be computed based on the maximum number of employees on duty or residing, or both, on the premises at any one (1) time.