With Randle confirmed and Waters set to remain, the Courtney and Le Brocq seats remain up in the air.
Edwards recently said Courtney would be an “asset” when the Gen3 regulations come into affect.
Despite ongoing COVID-19-imposed lockdowns, Edwards said restrictions on meeting with personnel will have no impact on contract negotiations.
41-year-old Courtney joined the team last year
“Three [drivers] are in Melbourne, and JC’s on the Gold Coast,” he said.
“It’s the world we live in now. Video conferencing's the norm.
“When you’re talking to people you already know, I don’t think it matters if you’re face-to-face having a coffee, or you’re having a coffee over a Zoom."
The 2021 season is set to resume at Tickford's home venue, Winton Motor Raceway, on October 2-3.