Upon application, the City Planning Commission may permit the modification of height and setback and street wall regulations of Section 23-651 (Tower-on-a-base) and paragraph (a) of Section 35-64 (Special Tower Regulations for Mixed Buildings), except for the permitted tower coverage or the required floor area distribution below a height of 150 feet, and may permit modification of the requirements of paragraph (a)(1)(ii) of Section 24-54 (Tower Regulations), provided the Commission makes the following findings:

(a)        that such modification will enhance the contextual relationship of the development or enlargement to nearby buildings and improve the overall scale, site design and architectural harmony among buildings in the neighborhood; and

(b)        that such modification will not unduly obstruct access of light and air to the detriment of the occupants or users of the buildings in the block or nearby blocks or of people using the public streets.

The Commission may prescribe additional conditions and safeguards to minimize adverse effects on the scale and character of the surrounding area.