reg sells a NP PDF thats spot on and you can use it in the LOC.

Muzza
My understanding is that type two is the minimum specification required for offshore sailboard races [organised events] in western australia.
Type one provides greater floatation and as such is also accepted in these races - I thing type one have the full collar to keep ya noggin above water if you pass out!!
Cheers 25

Edit

Just googled the AS numbers
1499 is the type 2 'bouyancy vest'
1512 is the type 1 'life jacket'

I think someone is taking the piss with the AS 2350
Google came up with - "AS 2350 (Lst)
Methods of testing portland and blended cements"

Mafia floatation!!!!