Commission Delegated Regulation (EU) 2015/1538 of 23 June 2015 supplementing Regulation (EU) No 1308/2013 of the European Parliament and of the Council with regard to import licence applications, release for free circulation and proof of refining of sugar products of CN code 1701 under preferential agreements, for the marketing years 2015/16 and 2016/17 and amending Commission Regulations (EC) No 376/2008 and (EC) No 891/2009