In discussions with the European Union in 2003-2004, Iran voluntarily froze its then-minimal enrichment program, pending negotiation of a full accord. Iran also declared its willingness to apply the “additional protocol,” allowing for much more far-reaching and stringent monitoring by the International Atomic Energy Agency than is called for under standard arrangements.
在2003—2004年间的对欧谈判中，伊朗自愿冻结了当时规模甚小的核浓缩项目，期待谈形成一个完整的协议。伊朗还宣布它愿意接受“附加协议”，接受比标准情况下深入得多、严格得多的国际原子能机构监督。