The series is now set for a second consecutive round at Sydney Motorsport Park, as a response to new Queensland border measures regarding Victoria.
Anybody who has been to Victoria can't enter Queensland without a 14-day mandatory hotel isolation period at their expense.
That complicated things for the three Queensland teams, Triple Eight, DJR Team Penske and Matt Stone Racing, in terms of travelling to Winton in northern Victoria for the July 18-19 event.
The circuit is some two hours north of Melbourne, where localised suburban lockdowns have begun to control rising case numbers, however the Queensland border control covers the entire state.
understands the Winton round has for now been formally postponed, not cancelled.
There is no word if the confirmed support categories, Super2/3, Carrera Cup and the Toyota 86 Racing Series, will also race at Sydney Motorsport Park.