Changes made by Commission Regulation (EEC) No 1766/91 of 14 June 1991 amending Commission Regulation (EEC) No 3813/90 laying down the level of the accession compensatory amounts for milk and milk products applicable in trade between the Community of Ten and Portugal and between Portugal and third countries: Commission Regulation (EEC) No 3813/90 of 19 December 1990 laying down the level of the accession compensatory amounts for milk and milk products applicable between the Community of Ten and Portugal and third countries