http://www.legislation.gov.uk/uksi/1981/314/madeThe Civil Aviation (Air Travel Organisers' Licensing) (Fourth Amendment) Regulations 1981enKing's Printer of Acts of Parliament1981-03-11 The Civil Aviation (Air Travel Organisers' Licensing) (Fourth Amendment) Regulations 1981InstrumentThe Civil Aviation (Air Travel Organisers' Licensing) Regulations 1995The Civil Aviation (Air Travel Organisers’ Licensing) Regulations 1995 reg.2 Sch.