MURCHISON MLC Ruth Forrest will press ahead with her bid to reopen the same-sex marriage debate, despite the Commonwealth launching a High Court challenge to the ACT's laws.
Ms Forrest said Tasmania did not have to wait for the ACT case to be resolved before reconsidering the issue here. She said as the ACT was a territory, it had a different relationship to the Commonwealth and its proposed legislation was different from Tasmania's.
Ms Forrest will move a motion to get the legislation back on the notice paper on Tuesday, clearing the way for a second debate on state-based same-sex marriage in the State Parliament this term.
The attempt is increasingly unlikely to succeed with little support for a fresh debate on the proposed legislation among MLCs.
Even supporters of the legislation last year are wary of revisiting the topic.
Rumney independent MLC Tony Mulder voted in favour of same-sex marriage last year, but is likely to vote against Mr Forrest's motion.
Mr Mulder doubted a new report from the Tasmanian Law Reform Institute released this week justified another substantive debate on the matter.
"The Parliament's spoken, nothing's changed," Mr Mulder said.
Without Mr Mulder's vote, the motion is expected to fail 9 to 5.
Rosevears MLC Kerry Finch will vote in favour, arguing it's worth testing MLCs' positions again.
"Let's have a look at it. There may be some members who have changed their mind, there may not be, let's see," he said.
Premier Lara Giddings urged a reopening of the debate.