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A "Vote Yes" banner in support of same sex-marriage hangs on a street in Sydney on September 5, 2017. 
Same-sex marriage advocates launched legal action in Australia's highest court on September 5, 2017 against a controversial government plan for a postal vote on the issue, calling it divisive and harmful. / AFP PHOTO / PETER PARKS        (Photo credit should read PETER PARKS/AFP/Getty Images)
A "Vote Yes" banner in support of same sex-marriage hangs on a street in Sydney on September 5, 2017. 
Same-sex marriage advocates launched legal action in Australia's highest court on September 5, 2017 against a controversial government plan for a postal vote on the issue, calling it divisive and harmful. / AFP PHOTO / PETER PARKS        (Photo credit should read PETER PARKS/AFP/Getty Images)

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    Australia to vote on same-sex marriage

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Australia to vote on same-sex marriage

Australia's High Court has ruled that a national postal vote on same-sex marriage will move forward, after a challenge by marriage equality advocates failed.

Australia to vote on same-sex marriage

Australia's High Court has ruled that a national postal vote on same-sex marriage will move forward, after a challenge by marriage equality advocates failed.