Council Directive 2005/94/EC of 20 December 2005 on Community measures for the control of avian influenza.
Commission Implementing Decision (EU) 2017/263 of 14 February 2017 on risk mitigating and reinforced biosecurity measures and early detection systems in relation to the risks posed by wild birds for the transmission of highly pathogenic avian influenza viruses to poultry.
Regarding wild birds:
Commission Decision 2006/563/EC of 11 August 2006 concerning certain protection measures in relation to highly pathogenic avian influenza of subtype H5N1 in wild birds in the Community.
Regarding captive birds, other than poultry:
Commission Implementing Regulation (EU) No 139/2013 of 7 January 2013 laying down animal health conditions for imports of certain birds into the Union and the quarantine conditions thereof
Commission Decision 2006/437/EC of 4 August 2006 approving a Diagnostic Manual for avian influenza as provided for in Council Directive 2005/94/EC
Commission Decision 2010/367/EU of 25 June 2010 on the implementation by Member States of surveillance programmes for avian influenza in poultry and wild birds
Regarding zoos and approved bodies, institutes or centres:
Commission Decision 2007/598/EC of 28 August 2007 concerning measures to prevent the spread of highly pathogenic avian influenza to other captive birds kept in zoos and approved bodies, institutes or centres in the Member States
The Belgian legislation regarding avian influenza is laid down in the Royal Decree of 5 May 2008.