The Accession Treaty signed on 16 April 2003 between the EU 15 Member States and the Member States which joined the EU on 1 May 2004
Pievienošanās līgumā, ko 2003. gada 16. aprīlī parakstīja ES–15 dalībvalstis un valstis, kuras ES pievienojās 2004. gada 1. maijā