A day that will go down in the history of the same-sex marriage campaign: Prime Minister Malcolm Turnbull and Opposition Leader Bill Shorten have both agreed that the same-sex marriage debate is about religious freedom.

Coalition for Marriage spokesman Lyle Shelton said this was a landmark day in the same-sex marriage campaign. 

“Both the Prime Minister and Bill Shorten have today advocated for the independence of religious institutions admitting that religious freedoms are at stake,” said Mr Shelton.

Reported in The Australian, Mr Shorten has vowed to block a bill to change the Marriage Act if it put religious freedoms at risk:

“I am a supporter of marriage equality, but I also have been raised to be a person of faith,” Mr Shorten said.

“I can give this guarantee to the Australian people: I and Labor [sic] not support legislation which impinges upon religious freedom in this country.”

“The Australian people however face voting on the future of an age-old social institution without any detail of what is to come,” Mr Shelton continued.

“Earlier today Prime Minister Malcolm Turnbull admitted the Australian people will not know the detail of any final legislation to change the Marriage Act before casting their votes in the plebiscite.

“The Government must make sure the people’s concerns on the protection of parents’ rights, free speech and freedom of religion are met with and dealt with. 

“We simply do not know what we are being asked to vote on.

“I say to all Australians – if you don’t know, vote ‘no’,” he concluded.