Commission Implementing Decision (EU) 2017/259 of 13 February 2017 concerning certain revised performance targets and appropriate measures included in the national or functional airspace block plans submitted pursuant to Regulation (EC) No 549/2004 of the European Parliament and of the Council that are not adequate in respect to the Union-wide performance targets for the second reference period and setting out obligations for corrective measures (notified under document C(2017) 729) (Text with EEA relevance. )