§ 154.54  EXCEPTIONS TO LOT WIDTH AND LOT AREA REGULATIONS.
   (A)  In the "AA-1" and "AA-2" Districts.  If a parcel of land has less area than herein required and its boundary lines along their entire length touched lands under other ownership prior to August 6, 1934 and have not since been changed, such parcel may be used for a single-family dwelling.  If the boundary lines of such parcel along their entire length between August 6, 1934 and July 7, 1943, touched lands under other ownership, and have not since been changed, and such parcel has an area of 15,000 square feet and an average width of not less than one-fourth of its average depth, such parcel may be used for a single-family dwelling.
   (B)   In the "A" District, if a parcel of land has less area than herein required, and its boundary lines along their entire length touched lands under other ownership prior to August 6, 1934, and have not since been changed, such parcel of land may be used for a single-family dwelling.
   (C)   In the "B" District, if a parcel of land has less area than herein required, and its boundary lines along their entire length touched lands under other ownership prior to October 18, 1940, and have not since been changed, such parcel of land may be used for a single-family dwelling.
   (D)   In the "C" District, if a parcel of land has less area than herein required and its boundary lines along their entire length touched lands under other ownership prior to August 6, 1934, and have not since been changed, such parcel of land may be used for a single-family dwelling.
   (E)   For any residence on a cul-de-sac in residence districts "AA," "AA-2", "A," "B", and "C," the required frontage may be taken at the building line but in no case shall the street frontage be less than 50 feet, except for lots of record.
   (F)   Lands used primarily for access to a lot of record where less than 50 feet wide may not be included in determining the area of a lot.