2002/304/EC: Commission Decision of 19 April 2002 approving programmes with a view to obtaining the status of approved zones and of approved farms in non-approved zones with regard to one or more of the fish diseases viral haemorrhagic septicaemia (VHS) and infectious haematopoietic necrosis (IHN) (Text with EEA relevance) (notified under document number C(2002) 1435)