Here it does say so
http://www.daff.qld.gov.au/fisheries...s-and-lobsters
Crab pots and dillies
In tidal waters, when fishing for blue swimmer crabs, mud crabs and spanner crabs, no more than four crab pots or dillies (or a combination of pots and dillies) may be used per person. Also a person must not possess more than four crab apparatus per person, on a boat on the water.
Crab pots and dillies must be marked by an identifying tag bearing the surname and address of the owner.
When not attached to a fixed object (for example tied to a tree above the high water mark), all crab apparatus must have a light coloured surface float attached. The float must not be less than 15 cm in any dimension and must be marked clearly with the owner's name.