Ground floor doors, etc. not to open onwards on streets.-

If any door gate, bar or window on the ground floor of any premises opens outwards upon a street or upon any land required for the improvement of a street in such a manner as, in the opinion of the Commissioner , to obstruct the safe or convenient passage of the public along such street, the Commissioner may at any time by a written notice require the owner of the said door, gate, bar or window altered so as not to open outwards.