No plinth of a building or any part thereof shall be less than 1 feet above the pre-determined level of-(a)the central part of the abutting street; or(b)the abutting foot path; or(c)the highest part of the lane or street which determines the drainage of premises; or(d)less than 1 feet above every portion of the ground within 23 feet of such building ;Provided that in cases where adequate drainage of the premises is not assured the plinth shall be of a suitable height as may be approved by the Executive Officer so as to assure adequate drainage :Provided further that for a building in a workmens area and for an outbuilding, generally, the plinth shall not be less than 1 feet and for a garage stable, warehouse and factory it shall not be less than six inches.
