The word 'authorised' in s 161 of the Land Administration Act 1997 (WA) requires only that the public work be within the scope of powers conferred by legislation; it does not require that all approvals necessary to complete the work (including Commonwealth environmental approval under the EPBC Act) be obtained before land can be compulsorily acquired. A determination by the Commonwealth Minister that a proposed action is a 'controlled action' under the EPBC Act does not constrain State compulsory acquisition powers. The scope and effect of s 191 of the Planning and Development Act 2005 (WA) as an alternative source of compulsory acquisition power was left open.
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