Hope you fella's stick together, it's the only way to achieve your goals, especially if the management are hell bent on trying to split you into groups in order to achieve their aims.
Correct me if I'm wrong, but I don't think any section has actually gone any further than advising their respective managers that PIA is being applied for in the FWA.
Once management realise that it is actually going to happen, they will do whatever it takes to avoid it.
Of course, it's a last resort, and it must be shown that negotiations alone will no longer achieve a desirable outcome for either party.
I'm not sure if it's still the case, but only AFAP members were allowed to utilise PIA under the new (Howard) Industrial Laws (providing that the AFAP is your Third Party to your Agreement).
Who is assisting you guys with your negotiations,TWU, AFAP??
Solo