COMMISSION DELEGATED REGULATION (EU) …/... supplementing Regulation (EU) No 1308/2013 of the European Parliament and of the Council as regards wine-growing areas where the alcoholic strength may be increased, authorised oenological practices and restrictions applicable to the production and conservation of grapevine products, the minimum percentage of alcohol for by-products and their disposal, and publication of OIV files, and amending Commission Delegated Regulation (EU) 2018/273 as regards the importation of wine originating in Canada and exempting retailers of holding an inward and outward register