In the early 21st century, the Ministry of State for Defence, just like that of Internal Security and Provincial Administration, is part of the presidential machinery. All but senior military officers are appointed, promoted, and, if necessary, removed by the military's personnel system. The president appoints and retires senior military officers. Under the authority of the president as Commander-in-Chief, the Minister of Defence presides over the National Defence Council. The Chief of General Staff is the tactical, operational and administrative head of the military. Under the 2010 constitution, the defence forces can no longer be deployed for combat operations within Kenya without the approval of Parliament.