Also - the best bit - "Cannot be promoted whilst in position."
In fact, if you're above the rank of Flight Lieutenant, Spec Aircrew usually comes with a DEMOTION.
There's some VERY happy former Group Captains wearing Flight Lieutenant rank on their shoulders now...
Doesn't necessarily encourage the FLTLTs who wanted the Spec Aircrew position to stay, especially when they're the one's with the option to leave and take a job overseas - for perhaps DEC with some high paying Chinese airline on an A330...
IMO the RAAF don't run the whole Spec Aircrew thing all that well.