Gay marriage bill introduced to Australian parliament Published duration 17 August 2015

image copyright AAP/Mick Tsikas image caption Mr Entsch says being gay is not a life style choice

A controversial bill to legalise same-sex marriage has been introduced to the Australian parliament.

The private member's bill comes amid heated debate among government MPs about whether to change the law or put the matter to a plebiscite.

The government's official position is that marriage should only be between a man and a woman.

Prime Minister Tony Abbott has denied government MPs a free vote on any bill legalising same-sex marriage.

The bill allows couples, regardless of "sex, sexual orientation, gender identity or intersex status" to marry.

Australia's Marriage Act limits marriage to a union of a man and a woman.

The bill was introduced by government backbencher Warren Entsch, one of several government backbenchers who plan to defy Mr Abbott by crossing the floor of the parliament to vote in favour of marriage equality.

The ban on a free vote for government MPs means it is likely to fail.

Plebiscite

Mr Abbott has said the matter should be "put to the people" in a non-binding plebiscite after the next general election, due in 2016.

Meanwhile, cross bench senators have backed an Australian Greens bill calling for a gay marriage plebiscite before the election.

Getting married in Australia

Australia's Marriage Act specifies marriage as a union between a man and a woman

Opinion polls taken over the past year show between 60% and 72% of Australians support gay marriage

Officially, the ruling Liberal-National coalition does not support gay marriage

The Opposition Labor party endorses gay marriage, but allows its MPs a conscience vote on legislation

In an impassioned speech, Mr Entsch spoke of how his bill, which has cross-party support, was designed to promote a more inclusive Australia.

"Being gay is not a lifestyle choice," the Queensland MP told the parliament.

"This bill does not create different classes of marriage," he said.