The NSW Waratahs hope to unveil Adam Ashley-Cooper in the coming days however have brushed off concerns about a potential erosion of the side's culture.
After throwing Karmichael Hunt a career lifeline, and Kurtley Beale making headlines after the leaking of two videos which featured drug usage, the Waratahs' squad will be closely scrutinised this Super Rugby season.
The ARU and NSW Rugby Union took no action against Beale after two videos, which were several years old, appeared on the internet last week.
In one, which was filmed by St George Illawarra NRL star Corey Norman, Beale is seen drinking a beer and laughing as an older man snorts a line of white powder off a plate.
In the other, Beale can be seen playing a vacuum cleaner like a didgeridoo before the camera pans to another man snorting a substance.
It comes after Beale and Ashley-Cooper were stood down from the England Test during last year's Spring Tour after they invited three women back to their hotel room.
Gibson said Beale had apologised for the videos however he had not been told he was on his last chance.
While Hunt admitted he couldn't afford any more slip ups after being forced out by the Queensland Reds for two drugs offences.
"One of the things we're ensuring is those standards on and off the field are firmly communicated and enforced," coach Daryl Gibson said.
The ARU is investigating introducing hair follicle testing in the wake of the release of the Beale videos.
The push received support from Hunt after he was subject to regular hair follicle testing during the past 12 months after he pleaded guilty to possessing prescription drug Xanax.
"We're looking at these tests and trying to catch people out but I think the most important thing that these tests do, and I've been working on this closely with my doctors and psychologists, is that it's a way to help players get better as well," Hunt said.
"If they can use that testing data to help players, if they're hiding issues or if they need a bit of help, then that's the perfect way to get them on track."
Hunt, 32, has been given the chance to resurrect his career, after being told he was unwanted by Reds coach Brad Thorn, and add to his six Wallaby caps.
Gibson said he had no doubt Hunt had the potential to return to the international arena.
Asked if he wanted to be part of Australia's World Cup campaign, Hunt said: "Love to."