Should opinion polls be replicated and the majority back same-sex unions, Turnbull says he will tell his lawmakers to support a marriage equality bill and the legislation could be approved by the end of the year.
One Nation voted with the government to restore the bill, along with Jacqui Lambie, Derryn Hinch, Lucy Gichuhi, David Leyonhjelm and Cory Bernardi.
If you have not registered before then you will not be able to vote in September when the postal votes are sent out.
Treasurer Scott Morrison defended the $122 million price tag of the postal ballot, insisting "keeping promises is money well spent".
"This isn't a plebiscite now, it's a completely novel, voluntary, non-binding, non-compulsory vote of a few citizens", he said.
"It is truly frightening that the government thinks it is ok to exceed its powers like this and to bypass the parliament", Wilkie told reporters in Canberra yesterday afternoon.
Sydney City Councilmember Christine Forster, who is the lesbian sister of former Prime Minister Tony Abbott, told the Blade on Monday the issue has "broad community support" and allowing gays and lesbians to marry in Australia "would do nothing more than bring us into line with the USA, U.K." and other countries in which they can legally do so.
Some in the gay and lesbian community are calling for a boycott to delegitimise the postal vote. The disagreements include whether to put the issue to legislators or voters, and whether that should be through the mail or a national vote, known in Australia as a plebiscite.
Gay-rights advocates say enough lawmakers already back marriage equality to make same-sex marriage legal in Australia now.
Former prime minister Tony Abbott is anxious making same-sex marriage legal will impede people's rights to freedom of speech and freedom of religion and says plans to give everyone the right to marry whomever they love is just another ploy in political correctness.
"In politics you win some, you lose some", the former prime minister and leading Liberal conservative told Sydney's 2GB radio.
On Wednesday morning, the government's attempt to reintroduce a same-sex marriage plebiscite was blocked by the Senate.
After months of delays and rumors about how Australia would make a democratic decision about the contentious issue, the process itself has become a subject of widespread scorn. Particularly from advocacy groups who may be taking the issue to the High Court to challenge the postal vote going ahead.
Campbell said that the decision has restored her faith in global law.
"The proposition that voluntary voting lacks legitimacy, I don't accept".
Opposition Leader Bill Shorten slammed the Liberal Party's policy as a delaying tactic.
"It wasn't done in the case of the advancement of the equal rights of Aboriginal people, it wasn't done in the advancement of women's legal right", he said.