Lawmakers overwhelmingly approved bill late last year
Alex Greenwich co-chairs Australian Marriage Equality
Advocacy group to challenge non-binding, voluntary postal plebiscite
Gay and Lesbian Victory Institute to help coordinate effort
Bill to hold plebiscite blocked in October
Plebiscite would cost taxpayers more than $100 million
Senators this week voted against going ahead with a vote
Tony Abbott's lesbian sister criticized speech to anti-LGBT group
Tony Abbottās sister is out member of Sydney City Council
Sen. Robert Simms of Green Party to reintroduce gay nuptials bill