126. Where in a cantonment any building, or wall, or anything affixed thereto, or any well, tank, reservior, pool, depression, or excavation, or any bank or tree, is, in the opinion of the Board in a ruinous state or, for want of sufficient repairs, protection or enclosure a nuisance or, dangerous to persons passing by or dwelling or working in the neighbourhood, the Board by notice in writing may, require the owner or part-owner or person claiming to be the owner or part-owner thereof, or, failing any of them, the occupier thereof to remove the same, or may require him to repair, or to protect or to enclose the same in such manner as it thinks necessary; and, if the danger is, in the opinion of the Board, imminent, it shall forthwith take such steps as it thinks necessary to avert the same.