In C1 and C2 Districts when mapped in R6, R7, R8, R9 and R10 Districts, and in C1-6, C1-7, C1-8, C1-9, C2-6, C2-7, C2-8, C4-2, C4-3, C4-4, C4-5, C4-6, C5-1, C6-1, C6-2, C6-3, C7, C8-2, C8-3, C8-4, M1-2, M1-3, M1-4, M1-5, M2 and M3 Districts, the City Planning Commission may permit modification of the bulk regulations for telephone exchanges or other communications equipment structures not existing on December 15, 1961, provided that the zoning lot has a minimum area of 40,000 square feet, a floor area ratio of no greater than 10.0 and that the following findings are made:

(a)        that the growth of the utility service demand to be served by the facility requires the construction of a building or other structure that would exceed the allowable bulk permitted by the district regulations;

(b)        that provisions of new or additional facilities at other locations would cause substantial duplication of plant and facilities;

(c)        that the proposal is the minimum modification necessary to permit the additional facilities needed to serve the demand;

(d)        that the design of the facility will not adversely affect the character of the neighborhood;

(e)        that the existing street and public transportation system will not be adversely affected; and

(f)        that, where appropriate and feasible in the judgment of the Commission, the applicant provides a public amenity for the benefit of the affected community.

The Commission may prescribe appropriate conditions and safeguards to minimize adverse effects on the character of the surrounding area and shall require that the certificate of occupancy shall be limited to such use.