To justify its position, Iran made reference to previous accords concluded between the late Shah of Iran and the West regarding Eurodif and Bushehr. Iran has also referred to similar accords between the West and other countries like North Korea or Libya, where agreements reached and promises made have not been kept. In Resolution 1737, adopted by the Security Council in December 2006, an initial series of sanctions against Iran was implemented because it did not suspend its uranium enrichment programme.