Signature - Commission Implementing Decision (EU) 2017/258 of 13 February 2017 concerning revised performance targets and appropriate measures included in the national or functional airspace block plan submitted by Switzerland 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) 728) (Only the French, German and Italian texts are authentic) (Text with EEA relevance)