For any large-scale residential development, the City Planning Commission may permit:
(a) the total floor area, lot coverage, dwelling units or rooming units permitted by the applicable district regulations or by Sections 78-32 (Bonus for Good Site Plan) or 78-33 (Bonus for Common Open Space) for all zoning lots within the large-scale residential development to be distributed without regard for zoning lot lines;
(b) the total open space required by the applicable district regulations or by Sections 78-32 or 78-33 for all zoning lots within the large-scale residential development to be distributed without regard for zoning lot lines except that where subdivision is authorized in accordance with the provisions of Section 78-51 (General Provisions), the Commission, in authorizing such distribution may allow reductions in the minimum required open space on individual zoning lots only where adequate provision is made for common open space to serve such lots;
(c) minor variations in required front or rear yards on the periphery of such large-scale residential development for the purpose of introducing variety or preserving natural features;
(d) in R1, R2, R6, R7, R8, R9 or R10 Districts, minor variations in the front height and setback regulations on the periphery of such large-scale residential development for the purpose of introducing variety, preserving natural features, or providing for improved access of light and air, but within the general purpose and intent of the height and setback regulations. In R3, R4 or R5 Districts, the Commission may modify the height and setback regulations set forth in Section 23-631 and paragraph (b) of Section 78-31, on the periphery of such large-scale residential development, for the purposes of introducing variety, providing a transition in neighborhood scale between the large-scale residential development and surrounding buildings, preserving natural features or view corridors, or improving the access of light and air;
(e) variations in the location of primary business entrances, show windows, and signs along frontages adjacent to zoning lots outside the large-scale residential development, without regard to restrictions applicable near Residence District boundaries, for the purpose of achieving better site planning and community planning. However, in no event shall the Commission allow such primary business entrances, show windows or signs to be located within 10 feet of the Residence District boundary; and
(f) modifications of the minimum spacing requirements consistent with the intent of the provisions of Section 23-71 (Minimum Distance Between Buildings on a Single Zoning Lot) and may authorize modifications of the spacing required by paragraphs (c), (d), (e) and (h) of Section 78-311 (Authorizations by the City Planning Commission).