Royal Commissioner Bret Walker SC has written to the State Government to provide an update regarding the progress of his inquiry.
An October hearing date was recently set for the High Court challenge, initiated in response to his issuing of summonses to Commonwealth witnesses and for the production of documents.
With his report due in February, Mr Walker has explained there is insufficient time to enforce the summonses if the High Court challenge were successful.
However, Mr Walker has advised that he is able to complete his report without pressing for the production of Commonwealth witnesses or documents, as he has received further evidence on which he can rely.
He will be withdrawing the summonses.
“We expect the High Court proceedings to be discontinued,” said Attorney-General Vickie Chapman.
"This will leave some important constitutional questions unresolved, but I believe the priority here is for the Commission to get on with its work and report back to the people of South Australia.
“Mr Walker has advised that he expects to provide his report by 1 February 2019 as scheduled.
“I look forward to receiving Mr Walker’s report in February.”