No such thing to be able to fly a turbine as such. If you're endorsed on a turbine powered aircraft, then you can go fly turbines (provided you're endorsed as required on the a/c,
).
This was always my understanding - if it's a multi or over 5700kg then you require a type endorsement anyway. A friend of mine, however, told me that he had received a C208 endorsement on his license to fly the Caravan, which seemed a bit strange as I'm pretty sure it comes in under the 4T mark.
I've also seen ads for "turbine endorsement" training in the past. Am I right in saying this is not a CASA requirement, or something stated in the CAOs, but rather just somebody providing ad hoc turbine training along with flight training in a turbine a/c?