Its primary mandate and mission is "to provide, in synergy with other inter-services, the most efficient, assured and cost effective aerial Defence of Pakistan." Since its establishment in 1947, the PAF has been involved in various combat operations, providing aerial support to Inter–Services's operations and relief efforts.[3] Under the Article 243, the Constitution of Pakistan appoints the President of Pakistan as the civilian Commander-in-Chief. The Chief of Air Staff (CAS), by statute a four-star air chief marshal, is appointed by the President with the consultation and confirmation needed from the Prime Minister of Pakistan.[4] The Pakistan Air Force is currently commanded by Air Chief Marshal Sohail Aman.[5]