Kravene om, at godtgørelsen skal være betinget af, at behandlingen og udgifterne er dækket af sundhedssystemet i patientens eget land, og om forhåndstilladelse til behandling, der kræver indlæggelse, er desuden elementer, der vil bidrage til at sikre stabilitet inden for de nationale sundhedsydelser.
Moreover, the requirements for reimbursement to be conditional on the treatment and costs being covered by the healthcare system in the patient's own country, and for the prior authorisation of treatment requiring hospitalisation, are safeguards which will help guarantee the stability of national health services.