Debate will begin in the Federal Senate today over proposed changes to remove discrimination against same sex couples.
The 68 proposed federal law amendments affect areas like superannuation, property ownership, Medicare and family law.
Advocacy group GetUp is calling on the Opposition to support the changes.
The group's national director Simon Sheikh says it is long overdue.
"We're hoping that Malcolm Turnbull shows leadership in getting his party room to support this legislation," he said.
"We know that Malcolm Turnbull himself supports it and now it's time for him to show some leadership in building and going past party politics to get something done here."
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