These Regulations amend Schedule 2 to the Single European Sky (National Supervisory Authority) Regulations 2013 (S.I. 2013/2620) to enable the Civil Aviation Authority to enforce implementing rules for interoperability made under Article 3 of the single European sky interoperability Regulation (No 552/2004) OJ L 96, 31.3.2004, p.26. The list of implementing rules is amended to include amendments and repeals to the existing rules and new implementing rules.