Regulation (EEC, Euratom, ECSC) No 261/68 of the Council of 29 February 1968 amending Council Regulation No 423/67/EEC, 6/67/Euratom of 25 July 1967 determining the emoluments of members of the EEC and EAEC Commissions and of the High Authority who have not been appointed members of the Single Commission of the European Communities