FAA to TC
TC clearly spell out the requirements.
PilotDimi23 does not have a current IPC and therefore must do the Commercial licence FAA to TC conversion first
then the holder of an FAA CFI Instrument instructor can do his Single Engine IPC which
then validates his FAA Instrument rating which gives TC the jurisdiction to convert
the FAA IR to a TC IR be it single or multi engine.
I get a call every few days requesting an FAA IPC single to convert an FAA IR to a TC IR
Hope that explains it.