Vice Custodian of the Two Holy Mosques Prince Sultan bin Abdulaziz Al Saud, who is also Chairman of the Board of Directors of the General Authority of Civil Aviation (GACA), will patronize here tomorrow the signing ceremony of three decades of Commerce Department for King Abdulaziz International Airport, King Khalid International Airport and King Fahd International Airport. In a statement to the Saudi Press Agency (SPA), GACA President Eng. Abdullah bin Mohammed Noor Rahimi said that the signing of these contracts comes in implementation of a decision issued GACA Board of Directors to implement commercial operation model at these airports.