All accessory off-street parking spaces may be provided within parking facilities, including public parking garages, on zoning lots other than the same zoning lot as the use to which they are accessory, provided:

(a)        such parking facilities are located within the Special St. George District ;

(b)        the off-street parking space within such facility is counted only once in meeting the parking requirements for a specific zoning lot ; and

(c)        the number of accessory parking spaces within such facility shall not exceed the combined number of spaces permitted on each zoning lot using such facility, less the number of spaces provided on each zoning lot using such facility.