The Federal Environment Minister has interrupted his holidays to travel to Hobart and warn Legislative Councillors the forest peace deal could collapse if it is not resolved quickly.
Tony Burke has only weeks to decide whether to progress a nomination to add some of the deal's proposed reserves to the state's Wilderness World Heritage Area.
The nomination is a crucial part of the deal to reduce logging in native forests but legislation to enact the agreement is stalled by an Upper House inquiry.
The delay has created a problem for Mr Burke who needs to lodge the world heritage nomination by the end of the month.
"Some people say that if a nomination doesn't go forward then that effectively would blow the entire agreement apart," he said.
"The challenge that we have is Australia has never been a nation which has put forward nominations for world heritage and then withdrawn them."
The Legislative Council and witnesses to the inquiry are still digesting amendments to the peace deal legislation detailing almost 300 parcels of native forest nominated for protection.
The 160 pages of amendments were delivered to MLCs on the eve of the first hearings on Tuesday.
Mr Burke says it is important Legislative Councillors are aware of the consequences.
"I want there to be full transparency of the challenges that they've brought on," he said.
"I've been quite committed that I didn't want to have a situation where we were cherry picking different parts of the agreement.
"That means a decision needs to be made before the end of this month and I do not know what that decision will be."
The Premier Lara Giddings is also worried.
"If they play around with that agreement, it means the agreement no longer exists and that means its failed, it's doomed," she said.
The inquiry's chairman, Huon MLC Paul Harriss, says world heritage listings are done annually, so the forest reserves can be nominated next year.
Mr Harriss says that in any case, the listing is not critical to the peace deal passing so Mr Burke is applying unnecessary pressure.
"It's not connected to the forest peace deal which has been worked out over the past couple of years," he said.
"It's got nothing to do with the timelines of the committee because my understanding is that it does need the sanction of the state parliament, both houses.
The inquiry resumes next week after three days of hearings.