Changes to Council Regulation (ECSC, EEC, Euratom) No 3139/82 of 22 November 1982 amending the tables of basic salaries laid down in Regulation (ECSC, EEC, Euratom) No 371/82 and (ECSC, EEC, Euratom) No 372/82 and adjusting, with effect from 1 April 1980, the weightings applicable to remuneration and pensions payable in the various countries of employment
EU Regulation No 3139/1982
Made by Council Regulation (EEC, Euratom, ECSC) No 440/83 of 21 February 1983 adjusting the remunerations and pensions of officials and other servants of the European Communities and the weightings applied thereto
From legislation.gov.uk's record of changes, the official one: see it there.