Dangerous land adjoining roads
51. If the Department is of the opinion—
(a)that a building, wall or other structure is in such a condition as to be dangerous to persons using a road;
(b)that there is in or on any land adjoining a road an unfenced or inadequately fenced source of danger to persons using the road; or
(c)that there is on any land adjoining a road any illumination which is a source of danger to persons using the road,
the Department may serve a notice on the owner of the structure or the owner or occupier of the land requiring him to carry out such works of repair, protection, removal, alteration or enclosure as will obviate the danger.