Photo: The Canadian Press

Same-sex marriage campaigners and volunteers cheer as they call on politicians to pass marriage equality legislation during rally outside Parliament House in Canberra, Australia, Thursday, Dec. 7, 2017.(Lukas Coch/AAP Image via AP)

The Australian Parliament voted on Thursday to allow same-sex marriage across the nation, following a bitter and divisive debate settled by the government polling voters in a much-criticized ballot survey that strongly endorsed change.

The public gallery of the House of Representatives erupted with applause when the bill passed to change the definition of marriage from solely between a man and a woman to "a union of two people" excluding all others. The legislation passed with a majority that wasn't challenged, although five lawmakers registered their opposition to the bill.

The Senate passed the same legislation last week 43 votes to 12. After royal assent and other formalities, the law will likely take effect in about a month, with the first weddings expected about a month later.

Amendments meant to safeguard freedoms of speech and religion for gay-marriage opponents were all rejected, though those issues may be considered later. The government has appointed a panel to examine how to safeguard religious freedoms once gay marriage is a reality in Australia.

Lawmakers advocating marriage equality had argued that the national postal survey in November mandated a change of the marriage definition alone, so changing the law should not be delayed by other considerations.

"It is now our job as members of Parliament to pass a fair bill that does not extend or create any new discriminations," an emotional government lawmaker Warren Entsch, who helped draft the bill, told Parliament. "It is a strong bill that already strikes the right balance between equality and freedom of religion."

"It's an historic day for Australia today and I think the celebrations around the country when we finally ... achieve marriage equality are going to be immense," Janet Rice said before the vote. Rice is a minor Greens party senator who was only able to remain married to her transgender wife of 31 years, Penny, because Penny remained listed as male on her birth certificate.

Penny Wong, an opposition Labor Party senator who has two children with her lesbian partner, said: "I am feeling happy."

Gay marriage was endorsed by 62 per cent of Australian voters who responded to the government-commissioned postal ballot.

Most gay rights advocates believed the government should have allowed marriages years ago and saw various ideas for a public survey as a delaying tactic. The U.N. Human Rights Committee had called the ballot survey "an unnecessary and divisive public opinion poll."

The current bill allows churches and religious organizations to boycott gay weddings without violating Australian anti-discrimination laws.

Existing civil celebrants can also refuse to officiate at gay weddings, but celebrants registered after gay marriage becomes law would not be exempt from the anti-discrimination laws.

One of the rejected amendments would have ensured Australians could speak freely about their traditional views of marriage without fear of legal action. It was proposed by Attorney-General George Brandis and supported by Prime Minister Malcolm Turnbull, both gay marriage supporters.

Former Prime Minister Tony Abbott, who was a high-profile advocate for traditional marriage, told Parliament that Turnbull and opposition leader Bill Shorten had failed to deliver detailed protections for freedoms of speech, conscience and religion in the bill.