Originally Posted by
asdf1234
Unless told otherwise then I think EU 2015/310 seems to be the definitive version of what is and isn't exempt.
If you are flying above FL285 you will need CPDLC by Feb 5 2020. Currently only 30% of traffic in Europe complies so I can only imagine there is going to be a big queue at the MROs in the next 12 months!