Thank you Linda,
The Portuguese CAA (INAC) actually told me that they cannot give me a licence with a date other then the 03/30/2012 because this is the date the MEP expires.
They say I cannot have a ME IR expiring the 03/30/2013 while MEP expires the 03/30/2012. They say it's illegal.
How does it appears on your UK licences on the "ratings to be revalidated" section?
On my licence it appears like this:
(Class/Type) / IR ----------- Validity
IR (ME) ------------ 31/03/2012
MEP (land) ------------ 31/03/2012
SEP (land) ------------ 31/03/2013