U2,
The current long haul fa EBA expires on Dec 17th. From Dec 18th long haul crew can take protected industrial action but they must give three days notice to QF, so Dec 21st would be the earliest date.
The FAAA has made it clear they will only recommend/support protected industrial action. The threat of a mass sick out, which I personally believe a lot of crew will agree with, has been organised by a separate group of crew.