I wonder why it is deemed "safe" for the initial issue to be completed in the Transport category but NOT the renewal?
Wrong way around, Garney_Bumble
You cannot do initial training (etc) in PRIVATE CofA aircraft (unless you own 100% of it) but you can do renewals etc...
You can do ALL (initial and renewals) in a PUBLIC Transport CofA, which is what flying school aircraft are kept on.
Just like what
Keef said.