Lawyers working on a class action against the Federal Government over the 2011 live export suspension say they are set to reveal strong evidence to support their case.

The Northern Territory Cattlemen's Association said it had nearly completed gathering evidence for its live export class action, which is calling for millions of dollars in compensation for pastoralists and industry members.

The industry body said the suit, which is being launched by law firm Minter Ellison, would launch after three years of unsuccessfully trying to negotiate its claim with the Federal Government.

The Brett Cattle Company, the lead claimant in the class action, would now be able to view the material that the former minister for agriculture Joe Ludwig used when he suspended live exports due to animal cruelty allegations in 2011.

NT Cattlemen's Association CEO Tracey Hayes said their claim that the suspension of trade was wrong would be vindicated.

"The material reviewed by law firm Minter Ellison supports Brett Cattle Company's points of claim and builds on the industry's long-held theory that the decision to suspend the trade in 2011 was rushed, made without real consultation and did little to actually improve trade or animal welfare conditions," Ms Hayes said.

Members of the Brett family, owners of the Brett Cattle Company, are leading the fight after losing millions of dollars when they could not send cattle to Indonesia from their station on the Northern Territory and West Australian border.

The open class action is believed to include the full breadth of industry players, from major corporates to smaller family-run pastoral stations.

"The next significant task is to complete the picture of what actually happened in the department and the minister's office in the days leading up to the ban and present our evidence to the court," Ms Hayes said.

Minter Ellison said it had also sought advice on the case from retired judge Roger Gyles QC.

A representative from the law firm said in Mr Gyles' evaluation of the draft statement of claim filed to the Federal Court, the action had a "meaningful prospect of liability being established".

Mr Gyles' report traced the events from when Mr Ludwig made his first order on June 2 banning the trade to 12 Indonesian abattoirs, to his blanket ban on all live exports to Indonesia five days later.

Ms Hayes said all potentially affected parties would now have the opportunity to opt out of the class action, which is the final formal step before the case proceeded to court.

The first hearing is expected to be in the second half of 2016.