For any large-scale residential development in a C4 District, the City Planning Commission may, by special permit, modify applicable district regulations to allow uses listed in Use Group 14A, not otherwise allowed in such district, provided that:

(a)        the uses are appropriate for the location and blend harmoniously with the rest of the large-scale residential development; and

(b)        the streets providing access to such uses will be adequate to handle the traffic generated thereby.

The Commission may prescribe appropriate conditions and safeguards to minimize adverse effects on the character of the large-scale residential development.