The Murray-Darling Basin Authority (MDBA) has been finally formalised after it passed the final hurdle of the Federal Parliament.

Yesterday saw the final period of time for Federal MPs to disallow or challenge the plan, meaning it will be fully implemented.

South Australian Premier Jay Weatherill welcomed the news, saying that it was a historical event for the nation.

This marks the end of a long campaign to deliver more water to the River Murray,” Mr Weatherill said.

“The Basin Plan will return 3200 gigalitres of water to the river – 450 gigalitres more than was first committed by the Commonwealth.

While the Plan was agreed to, and adopted on November 22 last year, it still had to go through a final process in the Federal Parliament, where members could move to have it disallowed.

“That process ends today and we expect the plan to be formalised so we can move on to implementation,” Mr Weatherill said.