Ms Giddings said the cabinet subcommittee set up last month to assess major projects had already met to make sure there would be no issue if Gunns receiver KordaMentha named a successful bidder later this month.

"Any proponent who wants to buy the permits can indeed be assured that those permits are live and will in fact be a project that can be built," Ms Giddings said. "This would be the cleanest, greenest, most modern, most efficient manufacturing that you could have, sitting alongside old manufacturing that is there in the Tamar Valley."

KordaMentha last week extended the deadline for expressions of interest in the controversial project to allow a number of investors who had already shown interest time to complete their assessments.

Ms Giddings said she knew there was "a lot of scepticism" about the viability of the project.

"I believe that we have the best chance now ever of getting this project up in Tasmania, and by gosh we need it," she said.

Greens leader Nick McKim said the pulp mill was a mirage.

"You've got the Labor and Liberal parties staggering like people dying of thirst in the desert, and every step they take forward the mirage is two steps away from them," Mr McKim said.