Changes to Regulation (EEC) No 210/69 of the Commission of 31 January 1969 on communications between Member States and…
EU Regulation No 210/1969
Made by Regulation (EEC) No 301/90 amending Regulation (EEC) No 210/89 on communications between Member States and…
From legislation.gov.uk's record of changes, the official one: see it there.