On lots zoned I-1:
(a) The maximum occupied area shall be seventy-five percent (75%) of the lot.
(b) The maximum floor area ratio shall be two hundred twenty-five percent (225%) of the lot area.
(c) The minimum requirements for front yards, side yards, and rear yards shall be the largest of those required for abutting residential districts or the following requirements, whichever is greater:
(.1) The minimum front yard depth shall be 50 ft. if abutting a residential or SP-PO district, otherwise the minimum front yard depth shall be 20 ft.
(.2) Two side yards shall be provided with a minimum width of 50 ft. each if abutting a residential or SP-PO district, otherwise the minimum width of each side yard shall be 12 ft.
(.3) The minimum rear yard depth shall be 50 ft. if abutting a residential or SP-PO district, otherwise the minimum rear yard depth shall be at least 12 ft.