(1) Subject to the provisions of Part II, in all buildings, every habitable room (except shops conducting, every habitable room (except) shops conducting retail business, restaurants, tea-rooms, store-rooms, cinemas, theatres, bars and kitchenettes having a floor area of less than 5 square metres), shall be provided with openings for the direct admittance of daylight.

(2) Such openings as make up the area required by section 4 are hereinafter referred to as “required daylight openings”.