I have emailed my Australian Underwater Federation ( Spearingfishing ) contact.
I should have a response in the next couple of days.
How will it affect us ?
Probably have no effect.
Couple of things they do...
1. float around on the surface up Bustad Head way spearing Spanish Macks
2. Hit Fitzroy Lagoon area.... shallows and spear trout, mainly
3. They may also chase Crays.
It is in known that a certain ( specific ) group of spearos from NSW will fill a freezer of Trout fillets knowingly breaking our law. These guys come up in early to mid October each year.
Spearos are subject to the same rules as we are in regard to size and in possession bag limits.
Cheers LP