(1) A board may require by notice the owner or occupier of any land or building —
(a) to demolish or to repair in such manner as it deems necessary any building, wall, bank or other structure, or anything affixed thereto, or to remove any tree, belonging to such owner or in the possession of such occupier, which appears to the board to be in a ruinous condition or dangerous to persons or property, or
(b) to repair, protect or enclose, in such manner as it deems necessary, any well, tank reservoir, pool or excavation belonging to such owner or in the possession of such occupier, which appears to the Municipality to be dangerous by reason of its situation, want of repair or other such circumstance.
(2) Where it appears to the Municipality that immediate action is necessary for the purpose of preventing imminent danger to any person or property, it shall be the duty of the Municipality itself, to take such immediate action; and in such case, notwithstanding the provisions of section 287, it shall not be necessary for the Municipality to give notice, if it appears to the Municipality that the object of taking such immediate action would be defected by the delay incurred in giving notice.