The Board of Standards and Appeals may permit modifications to the rear yards required pursuant to Sections 23-543, 24-393, 33-303 or 43-313 (For zoning lots with multiple rear lot lines) for zoning lots existing on April 30, 2008, provided the following findings are made:

(a)        that due to the irregular shape of the zoning lot, compliance with the rear yard regulations would create site planning constraints and adversely affect the layout and development of the site; and

(b)        that the requested reduction in rear yard depth is the least amount necessary to grant relief.

The Board may prescribe appropriate conditions and safeguards to minimize adverse effects on the character of the surrounding area.