One of the reasons is to allocate additional provision for procuring specialised stores and spare parts for the maintenance of the air traffic control system and the acquisition of aeronautical communication services for enhancement of flight safety 1 % ) 。原因之一是需要额外拨款以采购保养航空交通管制系统的特别用途物料和零件，以及增添航空通讯服务以加强飞行安全。
