Hi Radman,
My understanding is that you don't need to book any training courses but you do need to sit all 14 ATPL theory exams. Once you have passed all of the exams you'll then need to complete an ATPL skills test (providing you already have that type rating on your ICAO license). If it's a new type rating, you'll have to complete a type rating course.
I hope this helps.
WW