In C1-2 and C2-2 Districts, for youth-oriented or senior citizen-oriented community centers and non-profit neighborhood settlement houses, the City Planning Commission may permit modifications of the parking requirement of Section 36-21, provided the following findings are made:

(a)        that, because of site limitations, such a reduction is necessary for the proper design and operation of such community centers and non-profit neighborhood settlement houses; and

(b)        that available off-site parking and mass transit facilities are adequate to satisfy the additional parking demand generated by such community facility.