PLUS, in Queensland anyway, if you transgress on the water and incur a fine, the demerit points are recorded against your car licence. We don`t actually get a physical boating licence - it is recorded on your car licence.
Don`t know what happens if you haven`t got a drivers licence.
Bruce, up hear the 10knt rule doesn`t apply. Several years ago when we owned our sail boat (34ft) two of us were in a race - sailing with a spinnaker doing maybe 3knts - a slow day. The chaps in blue came alongside and asked to see my licence - I gave him the 10knt story and he said (ever so politely),,,,,,,,,,no..........I was wrong and needed one. He gave me the option of a fine or showing him a licence within 30 days.
Quick as a flash, and not needing to call a friend, I took the licence option - what a waste of time as Simi says but it saved the fine.
The Qld requirement is now linked to engine size - greater that 4.5kw (about 10hp I think)