Article 75 A civil aircraft in flight shall follow the air route and fly at the altitude specified by the air traffic control unit; permission shall be obtained from the air traffic control unit if a deviation from the air route or a change in flight altitude specified is necessary for one reason or another.
Article 76 Aircraft flying in the territory of the People's Republic of China must observe unified rules of the air.
A civil aircraft performing visual flight shall observe visual flight rules and keep a safe separation from other aircraft and ground obstacles.
A civil aircraft performing instrument flight shall observe instrument flight rules.
The rules of the air shall be formulated jointly by the State Council and the Central Military Commission.
Article 77. No crew member of a civil aircraft shall perform a flight mission if his flight time or time on duty exceeds the time limits prescribed by the competent civil aviation authority under the State Council.
No crew member of a civil aircraft shall perform a flight mission if his work capacity is impaired by the effect of alcoholic beverage, narcotic or other drugs.
Article 78 No civil aircraft shall fly into a pro-
