Changes made by Council Regulation (EEC, Euratom, ECSC) No 3777/89 of 14 December 1989 adapting the representation and special- duty allowances for the president and members of the Commission, the president, judges, advocates-general and registrar of the Court of justice and the president, members and registrar of the Court of first instance
EU Regulation No 3777/1989
No changes made by Council Regulation (EEC, Euratom, ECSC) No 3777/89 of 14 December 1989 adapting the representation and special- duty allowances for the president and members of the Commission, the president, judges, advocates-general and registrar of the Court of justice and the president, members and registrar of the Court of first instance are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.