Get in contact with 1st mate mobile marine. They are a site sponsor. If they can't help, I'm sure they will point you in the right direction.
@1stMateMobileMarine
Cheers
Rah
Use the link that Savit has put up to check the rules. If your still unsure a phone call to DPI would be the best way to get the correct information.
Good luck with the crabbing.
Cheers
Rah