Commission Delegated Regulation (EU) 2017/2416 of 20 October 2017 amending Delegated Regulation (EU) 2015/2195 on supplementing Regulation (EU) No 1304/2013 of the European Parliament and of the Council on the European Social Fund, regarding the definition of standard scales of unit costs and lump sums for reimbursement of expenditure by the Commission to Member States, and correcting that Delegated Regulation