(1) A project authority may establish or cause to be established as a restricted access area a project area or land occupied for the purposes of an approved project under section 75 of the Land Acquisition and Compensation Act 1986 , or any part of the project area or land, by any of the following—
(a) the use of fencing, barriers or other permanent or temporary means of physical demarcation;
(b) erecting signs or causing signs to be erected on or in close proximity to the area stating that the area is a restricted access area and the restrictions (if any) which apply in relation to that area.
(2) As soon as practicable after establishing a restricted access area under subsection (1), a project authority must cause a notice of the establishment of the restricted access area to be published in the Government Gazette.