http://www.legislation.gov.uk/uksi/2012/150/madeThe Air Navigation (Restriction of Flying) (Duxford) Regulations 2012King's Printer of Acts of Parliament2012-01-26 The Air Navigation (Restriction of Flying) (Duxford) Regulations 2012reg. 3(1)The Air Navigation (Restriction of Flying) (Duxford) (Amendment) Regulations 2012reg. 3reg. 1