24.无害通过和过境通行制度:
25.芝加哥公约:
26.国际航空运输协
定:The 1944 Chicago International Air Services Transit Agreement (The Two Freedoms Agreement)
a.the privilege to fly across the territory of another contracting state without landing(不降停飞越另一缔约国领土的权利)
b.the privilege to land for non-traffic purposes（在另一缔约国做非商业性降停饿权利） The 1944 Chicago International Air Transport Agreement (The Five Freedoms Agreement)
The privilege to take on and put down passengers ,mails and cargo in the territory of the state whose nationality the aircraft possesses and the territory of any other contracting state (允许装载和卸下去往和来自缔约国或第三国的旅客、货物、邮品三项权利) 27.国家航空器：P112 state aircraft
For example,military,police and customs aircraftt
指用于军事、警察、海关等履行国家或公共团体职能的航空器。 28.海牙公约：in flight 63：
For the purposes of this Convention, an aircraft is considered to be in flight from the moment when power is applied for the purpose of take- off until the moment when the landing run ends. 70：
For the purposes of this Convention, an aircraft is considered to be in flight at any time from the moment when all its external doors are closed following embarkation until the moment when any such door is opened for disembarkation. In the case of a forced landing, the flight shall be deemed to continue until the competent authorities take over the responsibility for the aircraft and for persons and property on board. 71：Article 2 For the purposes of this Convention:
(a) an aircraft is considered to be in flight at any time from the moment when all its external doors are closed following embarkation until the moment when any such door is opened for disembarkation; in the case of a forced landing, the flight shall be deemed to continue until the comp