Changes made by 2003/37/EC: Commission Decision of 16 January 2003 concerning guidance on a provisional reference method for the sampling and measurement of PM2.5 under Directive 1999/30/EC (notified under document number C(2003) 10)
EU Decision 2003/37
No changes made by 2003/37/EC: Commission Decision of 16 January 2003 concerning guidance on a provisional reference method for the sampling and measurement of PM2.5 under Directive 1999/30/EC (notified under document number C(2003) 10) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.