In the R-1-D Zone:
A. Space between main buildings on the same lot shall be not less than forty feet (40'), such space to provide a front yard for the rear dwelling and a rear yard for the front dwelling.
B. Vehicular access shall be provided to the rear building, either from a dedicated and improved alley, or by way of a paved access not less than twelve feet (12') wide.
C. If vehicular access is provided from an alley, there shall be a paved pedestrian access not less than three feet (3') in width from the front lot line to the rear dwelling. (Ord. 1000 § 18.20(J), 1955)