Complex sentence: Its original mandate was to support the Bonn Agreement (December 2001); reviewed annually, this mandate has been altered over time to reflect the needs of the country and was recently extended until 23 March 2012 by Resolution 1974.
Split into simpler sentences: Its original mandate was to support the Bonn Agreement (December 2001). Reviewed annually, this mandate has been altered over time to reflect the needs of the country and was extended until 23 March 2012 by Resolution 1974.