The probity check on James Packer's Crown Resorts that cleared it to run a casino at Barangaroo took only three months, "which probably rates as one of the fastest assessments of a casino applicant in history", the NSW gambling regulator has said.

Speaking at a gambling conference, Independent Liquor and Gaming Authority (ILGA) chief executive Micheil Brodie said this was because the NSW government directed it to take into account the findings of an earlier probity check into Crown, which fast tracked the process.

Under construction: Approval for Barangaroo took just three months. Credit:Brett Hemmings

Mr Brodie also shed light on the authority's view of the infamous brawl between Mr Packer and Nine Entertainment chief David Gyngell in Bondi, which occured during the assessment period.

"It’s fair to say that that had a lot of people thinking, oh my God, does that mean the licence application from Crown Resorts is dead?" he said. "Let me start by saying it was never dead because of that event."