Former Wollongong council general manager Rod Oxley, who was caught up in the scandal, said on Friday the ICAC's investigations at the time were "poorly managed" and he would welcome the chance to have the black mark against his name lifted.

"I think a lot of people have been done a significant amount of injustice by those findings," Mr Oxley said.

"The implications of those findings have been widespread, the council was sacked and a number of councillors who had no involvement suffered the same punishment as the others, and a number of individuals - including myself - had a stain against their name, which has continued until today."

The ICAC found 10 people - including Wollongong councillors, developers and public servants - had engaged in corrupt conduct.

Charges were laid against six people, with only three - former ALP councillor Frank Gigliotti, and developers Frank Vellar and Glen Tabak - found guilty.

On Wednesday, the nation's highest court ruled the ICAC had no power to investigate allegations that Margaret Cunneen, SC, and her son Stephen Wyllie advised his girlfriend, Sophia Tilley, to "pretend to have chest pains" at the scene of an accident with the intention of perverting the course of justice.

Former judge and ICAC commissioner David Ipp, QC, has since warned the decision "destroys" the commission's jurisdiction, and could mean findings of previous investigations could be overturned.

Former commissioner Jerrold Cripps, who was in charge of the Wollongong corruption inquiry, believes the current ruling may indeed alter some past and present investigations.

"I don't know what will or what won't, but there's no doubt certain findings will be the subject of review ... but you've got to remember the purpose of ICAC is not to lay charges against people."