Are there conditions dictated by unforeseen urgent operational circumstances or operational needs making possible an exemption from the EASA rules? Yes, there are.
RVSM: how airliners optimize the flight altitude in order to save fuel and fly safe. An unexpected issue when behemoth airliner encounters a small business jet.
The EU-CHINA Aviation Partnership Project (APP) talks about UAS
A list of the safest airlines, according to JACDEC
A consolidated version (PDF) of the EASA Continuing Airworthiness Regulation (Part M, Part 145, Part 66, Part 147, Part T) (Update June 2017)