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10.

B E Walters QC with E A Bennett and A N P McBeth appearing on behalf of Mr Ludlam and Ms Waters (instructed by FitzGerald and Browne)

C R C Newlinds SC with P Kulevski and R J Scheelings appearing on behalf of Senator Roberts (instructed by Holman Webb Lawyers)

B W Walker SC with G E S Ng appearing on behalf of Mr Joyce MP and Senator Nash (instructed by Everingham Solomons Solicitors and MinterEllison)

A L Tokley SC with H M Heuzenroeder and S A McDonald appearing on behalf of Senator Xenophon (instructed by Nick Xenophon & Co Lawyers)

R Merkel QC and J T Gleeson SC with E M Nekvapil and S Zeleznikow appearing on behalf of Mr Windsor in the reference concerning Mr Joyce MP (instructed by Quinn Emanuel Urquhart & Sullivan)

G R Kennett SC with B K Lim appearing as amicus curiae in the references concerning Senators Canavan, Nash and Xenophon (instructed by Australian Government Solicitor)

Notice: This copy of the Court's Reasons for Judgment is subject to formal revision prior to publication in the Commonwealth Law Reports.