Changes made by Council Regulation (EEC, Euratom, ECSC) No 161/80 of 21 January 1980 adjusting the remuneration and pensions of officials and other servants of the European Communities and the weightings applied thereto
EU Regulation No 161/1980
Made to Council Regulation (EEC, Euratom, ECSC) No 160/80 of 21 January 1980 amending the Staff Regulations of officials and the conditions of employment of other servants of the European Communities
From legislation.gov.uk's record of changes, the official one: see it there.