Senate voting reforms have been passed by a 36-23 margin after a marathon debate lasting 28 straight hours in Parliament's upper house.
Labor says the changes will entrench a Coalition majority, but the Government argues they reflect voter intentions more accurately.
There were heated exchanges overnight on the last Thursday as the debate continued nonstop until its conclusion early on Friday afternoon.
Special Minister of State Mathias Cormann said he was determined to push through the Government's legislation on changes to the system of voting for the Senate.
There were theatrics, too, with Independent senator Nick Xenophon wearing his pyjamas briefly in the upper house -- to make a point, he says.
Mr Xenophon, along with the Greens, had given the Government his support for the changes.
At one point, Labor senator Doug Cameron compared the Greens to characters from a Monty Python film, quoting from a famous film as he showed disdain for their support for change.
