sufficiently in advance of
the minimum age for commencing pension rights or before an age to be determined by national legislation, exchange with or make available to the person concerned and to institutions of other Member
States information (periods completed or other important elements) on the pension entitlements of persons who have changed from one applicable legislation to another or, failing that, inform those persons of, or provide them with, the means of familiarising themselves wit
h their prospective ...[+++]benefit entitlement.