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

The Commissioner may at

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