I think there are 4 reasonable options. Any other options that I can think of are just not feasible in the slighest.
A) abandon all racing up to April 1 and start with this zone theory
B) just scratch horses that are racing out of their zone over the next few days and then start zone theory (Bathurst would still to be abandoned though)
C) wait 14 days and start the zone theory
D) Cancel all racing immediately
I'm probably on the side of D but on the fence. D because of the good of the nation and the long term public image of racing its a no brainer to go with D. We are lucky hair dressers and coffee shops having been copping it past 24 hours and we have still somehow flew under the radar of the public. However I can understand the economic decisions and responsibility to industry stakeholders to not go with option D.
Which leaves A, B, and C. A&B are still a bit of a gamble with cross-zone contamination including from previous meetings if it comes out someone is infected, but nowhere as big as a gamble as racing at Bathurst. C would be ultra safe option but we lose 2 weeks now. We could come back in 2 weeks but then in 3 weeks time with the infection rates going as they are we could have people across multiple zones bring in infection from outside the harness industry anyway so multiple zones are shut down - so we could have just wasted 2 weeks of no racing for no return. But still A, B & C would seem the safest bets if trying to lock in a good (good in relative terms) economic result for stakeholders - much safer than racing at Bathurst.