Part III gives "authorised persons" (defined in section 7 as persons authorised in writing by the Minister) the power to enter and examine land for assessing suitability for a public purpose (section 10) and to occupy "neighbouring land" within 500 metres of authority land for works connected with a public purpose (section 11). Section 12 allows construction, taking of materials, road-making and erection of temporary buildings, but excludes quarry working and requires reasonable notice before interfering with roads, water, sewerage, gas, electricity or telecommunications lines (referencing the Telecommunications Act 1997).
The Minister's discretions are extensive. Under section 22 the Minister may make a pre-acquisition declaration. Under subsection 22(6), where a section 22(5) policy statement has been included, the Minister may certify the declaration as essential for the policy and therefore "unreviewable". Under section 24 the Minister may issue an "urgency or security" certificate, dispensing with the pre-acquisition declaration entirely if satisfied of urgent necessity contrary to the public interest in delay, or that a declaration would prejudice security, defence or international relations. Under section 41 the Minister makes the compulsory acquisition declaration that vests the interest in the acquiring authority and frees it from all other interests and encumbrances on Gazettal. Under section 47 the Minister may require urgent vacation by an occupier with reasons. Under section 119 the Minister authorises disposals of acquired land in writing.
Section 139 lists the powers the Minister cannot delegate, including authorising a person to act under sections 10, 11 or 14, including a section 22(6) statement, giving a section 24 certificate, dealing with a Tribunal recommendation under section 33, making a section 41 declaration, giving a section 47(2) notice, rejecting compensation claims under sections 70 or 98, and giving notice under paragraph 132(2)(a). Other powers can be delegated to APS officers or persons with executive authority over a Commonwealth authority.