Aha! The old CASA "I'm not sure, I'll put you through to Licencing/Regulation/Coffee Supplier"
I'm fairly certain that there is no "CSU" endorsement anymore, you either get MPPC (Man. Prop Pitch Ctrl) or APPC (Automatic). Like in a car, Manual covers you for Auto, but not vice versa. So, if you have MPPC or CSU on your licence, you're legally sorted. If not, I'm pretty sure (albeit not certain) that you need to get an APPC stamp.