Vice-Custodian of the Two Holy Mosques Prince Sultan bin Abdulaziz Al Saud, who is also the Chairman of the Board of Directors of the General Authority of Civil Aviation, will patronize here tomorrow the signing ceremony of Phase I of the design and engineering services contract for the development of King Abdulaziz International Airport with the Aéroports de Paris engineering company ADPI amounting to 512,900,000 Saudi Riyals. This was stated to Saudi Press Agency by Chief of the authority Abdullah Rahaimi who said this 14-month contract is one of the most important steps of the development project of Jeddah-based King Abdulaziz International Airport which will be opened in 2012 and then will accommodate 30 million passengers.