On further consideration, I am doubtful whether there is power to make a regulation under the National Security Act providing that a notification in the Gazette shall not be necessary where land is acquired under the Lands Acquisition Act for Defence purposes.
Regulations can be made under the National Security Act which override the provisions of other Commonwealth Acts, but I think that the words ‘other than land’ in paragraph (b) of section 5 of that Act would be construed as indicating an intention to exclude the power to make regulations authorising the acquisition of land.