Changes made by 2003/231/EC: Council Decision of 17 March 2003 concerning the accession of the European Community to the Protocol of Amendment to the International Convention on the simplification and harmonisation of customs procedures (Kyoto Convention)
EU Decision 2003/231
No changes made by 2003/231/EC: Council Decision of 17 March 2003 concerning the accession of the European Community to the Protocol of Amendment to the International Convention on the simplification and harmonisation of customs procedures (Kyoto Convention) are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.