Yes the EASA PART MED 15th Dec is the document you need to read. It looks like its a big change from JAR and one for the better.
Document:
http://tinyurl.com/easafcl
Is this the document the Medical Center will refer to when I'll make my Medical Class I after April 2012?
Because this Guidance Material published in December 2011 differs slightly from the EU regulation published in November 2011.
Happy landings