(1) Subject to this section, an authorised officer may exercise any power conferred by this Act on a road authority to enter upon any land.
(2) Unless an authorised officer is of the opinion that it is necessary to do so because of an emergency, an authorised officer must not enter any privately owned property unless—
(a) the owner has given consent; or
(b) the authorised officer has given the owner reasonable notice of the intention to enter at a reasonable time.
(3) A road authority or an authorised officer must in exercising any power to enter upon any land—
(a) cause as little harm and inconvenience and do as little damage as possible to the land and anything on or growing on the land; and
(b) remain upon the land only for such period as is reasonably necessary; and
(c) remove from the land on the completion of the occupation of the land all plant, machinery, equipment, goods or buildings brought onto, or erected on, the land other than any of those things that the owner or occupier agrees may be left on the land; and
(d) leave the land, as nearly as possible, in the condition in which it was immediately before the land was occupied; and
(e) use best endeavours to co-operate with the owner and occupier of the land.