For the purpose of maintaining and working any of the railways
required or authorized by this Act to be constructed or acquired, and in
relation to those railways, the Commonwealth, or any authority constituted or
appointed by or under the Commonwealth, shall have all such powers, functions,
rights, privileges, and immunities, as the South Australian Railways
Commissioner or other similar authority has at the date of the Agreement in
relation to the State Railways of the State, so far as those powers,
functions, rights, privileges, and immunities, are applicable.