A general aviation enterprise uses free balloon for flight shall, 1 month before activity, enclose the plan to apply for CAA permission.The plan shall include following papers:1) Reason for application.2) Contents of activities (including nationality mark, registration number of the free balloons and estimated starting and ending time of activities).3) Airspace (including Scope, Height and Period of time).4) Relevant document of the temporary take off and landing field used.5) Certificate of liability insurance takenThe airspace referred to in subparagraph 3 of the preceding paragraph shall be complied with the relevant provisions of the Rules of the Air.The temporary take off and landing field referred to in subparagraph 4 of paragraph Ⅱ shall be complied with Article 21 of Regulations Governing the Management of Private Airfields.A general aviation enterprise conducting the flight actives of free balloons shall submit the passenger list (Attachment 4) to the airport designated by CAA for record as well as the passenger list changed.Attachment 4 Passenger List.pdf