Changes to 90/252/Euratom, ECSC, EEC: Commission Decision of 29 May 1990 adjusting the weightings applicable from 1 February 1990 and correcting Commission Decisions 89/582/EEC, Euratom, ECSC and 89/619/EEC, Euratom, ECSC adjusting the weightings applicable from 1 September 1989 and 1 November 1989 to the remuneration of officials of the European Communities serving in non-member countries
EU Decision 1990/252
No changes to 90/252/Euratom, ECSC, EEC: Commission Decision of 29 May 1990 adjusting the weightings applicable from 1 February 1990 and correcting Commission Decisions 89/582/EEC, Euratom, ECSC and 89/619/EEC, Euratom, ECSC adjusting the weightings applicable from 1 September 1989 and 1 November 1989 to the remuneration of officials of the European Communities serving in non-member countries are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.