The National Defence and Security Council is an eleven-member national security council responsible for security and defence affairs in Myanmar. Though the president is the chief executive of the government of Myanmar, the 2008 Constitution reserves certain important executive powers for the NDSC and certain actions of the president and the Tatmadaw (military) require approval by the NDSC. Of the 11 members, the commander-in-chief of defence services appoints 5 members and controls 6 votes. The NDSC's existence is enshrined in Chapter V of the 2008 Constitution of Myanmar, and it was formed on 31 March 2011.