Changes made by 2004/224/EC: Commission Decision of 20 February 2004 laying down arrangements for the submission of information on plans or programmes required under Council Directive 96/62/EC in relation to limit values for certain pollutants in ambient air (notified under document number C(2004) 491)
EU Decision 2004/224
No changes made by 2004/224/EC: Commission Decision of 20 February 2004 laying down arrangements for the submission of information on plans or programmes required under Council Directive 96/62/EC in relation to limit values for certain pollutants in ambient air (notified under document number C(2004) 491) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.