Article 4 — MINIMUM LOT AND BUILDING SITE AREAS

The requirements of this Division as to minimum lot area or building site area shall not be constituted to prevent the use for dwellings of any lot or parcel of land, other than in the M-2 District, in the event that such lot or parcel of land is:

a) Shown separately on or hereafter shown upon any official subdivision map duly approved and recorded;

b) Shown separately or hereafter upon any map duly approved and recorded in accordance with the provisions of Chapter 2 of Division 9 of this Code;

c) Created by a deed recorded on or before January 1, 1952; or

d) Created by a deed recorded between January 2, 1952 and March 12, 1959, and the division of such lot or parcel of land complies with the provisions of the laws of the State and City in effect at the time of recordation.

No portion of any lot or parcel of land which has been designated or used as a part of a building site area or yard as required by this Division shall be included as a portion of an area or yard for another building if said inclusion will reduce the building site area or yard required for the original lot or parcel of land to less than the minimum building site area or dimension of yard required for the land use district in which such property is located.