86-21 - Special Floor Area Regulations in C4-5X Districts LAST AMENDED 3/24/2009 In C4-5X Districts within the #Special District#, the underlying #floor area ratio# for #commercial uses# shall not apply. In lieu thereof, the provisions of Section 33-122 (Commercial buildings in all other Commercial Districts) shall be modified to permit a maximum #floor area ratio# of 5.0.