Exceptions to the following restrictions may be authorised:
a. the restrictions under Article 27:
1. in the Sectoral Plan for Aviation Infrastructure perimeter of an aerodrome: by the aerodrome manager at aerodromes without an air traffic control service, by the air traffic control unit in agreement with the aerodrome manager at aerodromes with an air traffic control service,
2. at penal institutions: by the competent cantonal authority,
3. in military areas: by the Joint Operations Command, the situation monitoring unit of the armed forces,
4. at (outdoor) switching stations or substations of grid level 2 of the power supply system: by the operators responsible,
5. at the Ruswil compressor station and the Wallbach measuring station: by the operators responsible,
6. at the nuclear power plants and the Würenlingen interim storage facility: by the competent holders of construction or operating authorisation in accordance with the Nuclear Energy Act of 21 March 20031;
b. the requirements under Article 28:
1. within a distance of 5km or a reduced geographical zone around an aerodrome: by the aerodrome manager at aerodromes without an air traffic control service, by the air traffic control unit in agreement with the aerodrome manager at aerodromes with an air traffic control service,
2. in an active CTR: by the air traffic control unit.
Exceptions to the following restrictions under Article 27 letter a and Article 28 may only be authorised if flight safety is guaranteed.