Changes made by Commission Implementing Regulation (EU) 2018/604 of 18 April 2018 amending Implementing Regulation (EU) 2015/2447 as regards the procedural rules to facilitate the establishment in the Union of the preferential origin of goods, and repealing Regulations (EEC) No 3510/80 and (EC) No 209/2005: Commission Regulation (EEC) No 3510/80 of 23 December 1980 on the definition of the concept of originating products for purposes of the application of tariff preferences granted by the European Economic Community in respect of certain products from developing countries