The Federal Government has agreed to a deal with the Greens to get its wheat deregulation bill through Parliament.

The bill abolishes Wheat Exports Australia (WEA) and the 22-cents-a-tonne charge it imposes on producers.

The legislation has split the Coalition, with east coast MPs against it and some Western Australian MPs wanting to back it.

Some Coalition MPs had threatened to cross the floor in support of the bill.

Greens Senator Rachel Siewert says her party will back the legislation in both houses of Parliament after Labor agreed to support amendments in the Senate.

She says they will ensure a port-access code of conduct is legislated and an oversight body is set up.

"And that none of the provisions of the Act would come into place until that regulation ... putting in place that mandatory access code are in place," she said.

"We have also reached agreement there will be an amendment that puts in place a ministerial advisory taskforce or body."

The former Liberal MP Wilson Tuckey has congratulated the Greens for supporting the bill.

But, he says he is disappointed about the lack of support from his former WA colleagues, including the deputy Opposition Leader, Julie Bishop.

"As I have made very plain, I am extremely disappointed that there is not a total vote of West Australian Liberal members for this particular measure," he said.

The WA Farmers Federation has welcomed the deal.

The federation's president, Dale Park, says he is not concerned which party backs the bill as long as it gets through.

"It's good to see this bill going through," he said.

"We've said right from the start that we don't see any need for WEA so it doesn't really matter how we get it, as long as we get what we wanted."