"User charges" means a charge imposed on airlines for the provision of airport, air navigation, or aviation security facilities or services including related services and facilities.
“使用费”，指提供机场、空中导航或航空保安设施或服务，包括相关服务和设施，而向空运企业收取的费用。
In 1919, the International Commission for Air Navigation (ICAN) was created to develop General Rules for Air Traffic.
1919年，国际航空委员会(ICAN)成立，并开始制定空中交通通用规则。
In 1919, the International Commission for Air Navigation (ICAN) was created to develop General Rules for Air Traffic.
1919年，国际航空委员会(ICAN)成立，并开始制定空中交通通用规则。
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