Changes to Regulation (EEC) No 1831/73 of the Commission of 4 July 1973 providing for licences for the import of cotton yarn into the United Kingdom originating in and coming from non-member countries: Regulation (EEC) No 2223/73 of the Council of 10 August 1973 extending the period during which the importation into the United Kingdom of cotton yarn originating in and coming from non-member countries is to be subject to authorization