The chief executive may, by complying with this subdivision, immediately amend or suspend a protected area authority if—
(a) the chief executive reasonably believes the amendment or suspension is necessary—(i) to ensure the health or safety of a person or protect a person’s property; or(ii) to minimise risk to, or safeguard the health of, a person because of a fire or natural disaster; or(iii) to conserve or protect the cultural or natural resources of the protected area to which the authority applies; or
(b) the area to which the authority applies is declared, after the grant of the authority, to be a restricted access area, or an area closed to the public; or
(c) the chief executive reasonably believes the activities being conducted under the authority are having an unacceptable impact on the character or amenity of the protected area to which the authority applies.