(A) No cellar shall be used for living purposes.
(B) No basement shall be used for living purposes unless:
(1) The floors and walls are substantially watertight;
(2) The total window area, total openable area and ceiling height are equal to those required for habitable rooms;
(3) The required minimum window area of every habitable room is entirely above grade adjoining the window area, not including stairwells or access ways.
(1976 Code)