Remember the rules change last week "Elimination of the virus does not mean zero cases but zero tolerance" (From the Prime Minister) a change from eradication retoric from the previous weeks. If this is now the school of thought then it may open the gate for a TT bubble. I would suspect if so then contact tracking/tracing would form a significant parameter both sides of the Tasman. Maybe done but a requirement to upload a tracking app that works on both sides of the ditch.