307. (1) No person who proposes to build, take down or rebuild any building or wall, or to alter or repair any part of any building or wall, shall in any case in which the footway in any adjacent street will be thereby obstructed or rendered less convenient, commence doing so without first having caused to be put up a proper and sufficient hoard or fence, with a convenient platform and hand-rail if there be room enough for the same and the [Municipal Commissioner] shall think the same desirable, to serve as a footway for passengers outside of such hoard or fence.
(2) No hoard or fence shall be so put up without the previous written permission of the [Municipal Commissioner], and every such hoard or fence, put up with such permission, with such platform and hand-rail as aforesaid, shall be continued standing and maintained in good condition, to the satisfaction of the [Municipal Commissioner], by the person who carries on the work, during such time as may be necessary for the public safety and convenience and, in all cases in which the same is necessary to prevent accidents, the said person shall cause such hoard or fence to be well lighted during the night.
(3) The [Municipal Commissioner] may, by written notice, require the person aforesaid to remove any hoard or fence so put up.