Please post a link to support your assumption.
There is no link to post. There is nothing written therefore there is no requirement for notice of lockout. Unlike, it is written that a union must give 3 days notice of implementing PIA.
It isn't written that you shouldn't walk under a semi trailer but that doesn't mean you should or you shouldn't : it's your choice whether you do or you don't and whether you give notice and how much.
As I said above, one of a number of flaws in the FWA laws.
Try asking a lawyer in the know what happens if agreement is reached in the mediation phase but is voted down by the union members; what happens then: binding arbitration? back to mediation? back to PIA? back to ballot approval for PIA? back to FWA approval for PIA? nothing? no EBA renewal? double dissolution? Collingwood wins the premiership?