Division (b): Member States authorised to carry out the survey once a year in April, May/June, August or November/December - Commission Decision of 26 October 2004 laying down detailed rules for the application of Council Directive 93/23/EEC as regards the statistical surveys on pig population and production (notified under document number C(2004) 4090) (Text with EEA relevance) (2004/760/EC)