On 8 December 2005, the Optional Protocol to the Convention on the Safety of United Nations and Associated Personnel was adopted by the UN General Assembly. The Optional Protocol simply expands the scope of what constitutes a "UN operation" to include "delivering humanitarian, political or development assistance in peacebuilding" and "delivering emergency humanitarian assistance". The Optional Protocol was signed by 34 states, came into force on 19 August 2010, and as of June 2016 has been ratified by 30 states.