(a) Collective provision of off-street parking and loading facilities by two (2) or more buildings or uses located on adjacent lots is permitted to allow for the sharing of such facilities for commercial and multiple use centers according to the following schedule:
(1) For buildings or groups of uses of less than ten thousand (10,000) square feet, the total parking and loading facilities shall not be less than the sum of the requirements for the various individual uses computed separately.
(2) Where the total area of nonresidential use is greater than ten thousand (10,000) square feet, but not less than thirty thousand (30,000) square feet, the total number of parking spaces provided shall equal one (1) car for every two hundred (200) square feet of building floor area. Additional parking shall be provided for residential uses built in conjunction with a center of this size and shall equal at least one and one-half (1.5) spaces for each dwelling unit. Off-street loading facilities may be based on documented, actual use of facilities similar to the combined uses or the total as required if calculated as separate uses.
(3) Where the total non-residential use is greater than thirty thousand (30,000) square feet, the number of off-street parking spaces provided shall equal five and one-half (5.5) cars for every one thousand (1,000) square feet of building floor area. Off-street loading facilities may be based on documented, actual usage of facilities similar to the combined uses or the total as required if calculated as separate uses. In centers of this size, which in addition to retail shops and services contain residential and/or office spaces, additional parking shall be provided according to the following:
A. Residential: one parking space for each dwelling unit.
B. Office: one parking space for each three hundred (300) square feet of building floor area which exceeds twenty percent (20%) of the total gross floor area of the non-residential uses.