1. There is never a requirement to complete initial IR training again, no matter when the IR expired. However, if the IR has not been revalidated or renewed in the preceding 7 years the theoretical knowledge examinations must be passed again.
2. EASA does not require a minimum number of training sessions. It is up to the ATO to determine what training is required to reach the standard required to pass the IR proficiency check.
3. Before commencing a MPA type rating a pilot must hold or have held a MEIR. There is no requirement to renew the MEIR before commencing the MPA type rating course.