Except as modified in this Chapter, the following bulk regulations shall apply:

(a)        For developments, enlargements, or changes of use containing residences, the bulk regulations of a C6-4A District, as set forth in Article III, Chapter 4 (Bulk Regulations for Residential Buildings in Commercial Districts) or Article III, Chapter 5 (Bulk Regulations for Mixed Buildings in Commercial Districts), shall apply; 

(b)        For developments, enlargements, or changes of use containing manufacturing, commercial or community facility uses, the bulk regulations set forth in Article IV, Chapter 3 (Bulk Regulations), shall apply.

For the purposes of applying the regulations of this Section, Greenwich Street shall be a wide street.