This zone district is designed for single family residential development as permitted and regulated within the underlying R-3 Residence District however, in addition to those uses permitted within the R-3 Residence District, the R-3A Residence Overlay District shall also permit two-family residences designated solely for affordable housing subject to all the regulations and restrictions of the underlying R-3 zone. Any two-family residence within the R-3A Residence Overlay District shall be deed restricted as affordable housing units in accordance with the Borough of Bernardsville Affordable Housing Ordinance requirements.