S T A T U T O R Y I N S T R U M E N T S 2021 No. 517  CIVIL AVIATION  The Air Navigation (Restriction of Flying) (Crawley)  (Emergency) (Revocation) Regulations 2021  Made -  -  -  -  at 9.30 p.m. on 26th April 2021  Coming into force -  -  with immediate effect  The Secretary of State previously decided that it was necessary in the public interest to restrict  flying in the area specified in the Schedule to the Air Navigation (Restriction of Flying) (Crawley)  (Emergency) Regulations 2021( a ) (“the principal Regulations”) by reason of an emergency having  arisen in that area.  The Secretary of State makes the following Regulations in exercise of the powers conferred by  article 239 of the Air Navigation Order 2016( b ).  1.  These Regulations may be cited as the Air Navigation (Restriction of Flying) (Crawley)  (Emergency) (Revocation) Regulations 2021 and come into force with immediate effect.  2.  The Air Navigation (Restriction of Flying) (Crawley) (Emergency) Regulations 2021 are  revoked.  Signed by authority of the Secretary of State for Transport  David J Best Grade 7  Department for Transport  At 9.30 p.m. on 26th April 2021  Citation and commencement  Revocation of Regulations  EXPLANATORY NOTE  (This note is not part of the Regulations)  These Regulations revoke the statutory instrument which imposed emergency restrictions on  flying in the area specified in the Schedule to that instrument, the emergency in question having  passed.  ( a ) S.I. 2021/514.  ( b ) S.I. 2016/765, to which there are amendments not relevant to these Regulations. 