Hi stitch
The local WA maritime rules state you must wear a PFD type 1 when 400m offshore. I have spoken to the water police and DoT and they are totally realistic when it comes to surfers, but for downwinders we have to comply, which is both logical and sensible.
Invest in an inflatable PFD 1, they'll ping you if you have PFD type 2 and are offshore greater than 400m. They are reasonably priced around $90.
All Upcoming local ocean events will require a PFD type 1, except the doctor but hopefully they'll come round.