Two signatories confirmed yesterday that they were now seeking to have the bill amended in the Legislative Council, which will debate the legislation next week.

The areas they want specifically mentioned in the bill refer to sovereign risk, the Forest Practices Authority, categories of logs  and accreditation and licensing of forest contractors.

Timber Communities Australia president Jim Adams said he was actively encouraging MLCs to change the bill.

``Under the terms of agreement (we signed) we must back it in, so to speak, and we are doing that, but that doesn't mean there aren't ways in which the Legislative Council could improve the bill without it falling over, and we'll back that in as well,'' Mr Adams said.

Tasmanian Forest Contractors Association chief executive Ed Vincent also said there were parts of the agreement that  should be addressed in the legislation.

The Forest Industries Association of Tasmania is also understood to be pushing for amendments.

It is unclear whether those amendments would be acceptable to both Labor and the Greens - the latter have already publicly stated that they do  not support the entire agreement. Neither would comment yesterday.

The legislation will fall over if both the House of Assembly and Legislative Council cannot agree.

 Wilderness Society spokesman Vica Bayley said environment signatories would not be opposed to such amendments as long as they mirrored the agreement that was eventually signed by all 11 groups.

``If there's something that's been missed or adds value (to the legislation), that's fair enough, just as long as it maintains the intent and structure of the agreement,'' he said.

Timber Communities Australia was the last signatory to come on board, after it waited to carry out a ballot of its members. 

The national board signed up, despite its membership opposing the deal. Yesterday  the Meander-Liffey branch condemned the decision of the TCA board and its subsequent review which did not result in a change of heart.