At least 50 findings made by the Independent Commission Against Corruption over the past decade have been thrown into doubt by a High Court ruling on the watchdog's powers, including findings against a barrister and a solicitor who misled courts in criminal cases.

Premier Mike Baird will meet ICAC Commissioner Megan Latham this week amid the fallout from the High Court ruling in the battle between the watchdog and Crown prosecutor Margaret Cunneen, SC.

Crown prosecutor Margaret Cunneen. Credit:Nic Walker

The ICAC has said it will agree to court orders declaring invalid findings against mining mogul Travers Duncan and other businessmen who were embroiled in an inquiry into a coal tenement created on top of the Obeid family farm.

The commission said it had "no arguable basis or option to resist" the orders in light of the Cunneen decision.