http://www.legislation.gov.uk/uksi/2004/1958/regulation/2/2013-12-12The Single European Sky (National Supervisory Authority) Regulations 2004 (revoked)texttext/xmlenCIVIL AVIATIONStatute Law Database2020-05-29Expert Participation2013-12-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .National Supervisory AuthorityF12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .