Actually I'm fairly certain that there is a rating required on the Cirrus CSU...
If you have a MPPC rating(Manual Propellor Pitch Control), then that covers you. If you don't have it you apparently need an APPC (Automatic blah blah), or so I've heard.
True, you don't get a CASA type rating, but you do get the schools approval to use their aircraft.
Arrr