Air Law and ATC Procedures: Rules, Clearances and Airspace
The regulatory framework
Air law questions test precise knowledge of the international and national rules that govern flight. Know the hierarchy: ICAO Annexes set standards and recommended practices, while the State's own regulations (and any differences filed with ICAO) have legal force for the pilot. Be clear on Annex 2 (Rules of the Air) for right-of-way, minimum heights and light rules, Annex 1 for licensing, Annex 6 for operations, and Annex 12 for search and rescue.
Airspace and clearances
Understand airspace classes and what each requires in terms of clearance, separation and radio communication. A clearance is an authorisation, not an instruction to act outside your responsibility: you must still accept or refuse it and remain responsible for terrain and obstacle clearance unless a specific service (such as radar vectoring in a known environment) transfers that responsibility.
Traps in questions
- Right-of-way: converging aircraft of the same category - the one on the right has right of way; head-on - both turn right; overtaking - the overtaken aircraft has right of way.
- Minimum height: over congested areas, sufficient height to land clear in an emergency, typically 1000 ft above the highest obstacle within a stated radius; elsewhere 500 ft from persons, vessels and property.
- VMC/IMC and special VFR: know the visibility and cloud-distance minima for the class of airspace, and that a special VFR clearance does not change your responsibility to remain clear of cloud and in sight of the surface.
- Position reporting and readback: mandatory readback items include route clearances, altitude instructions and runway assignments.
Worked example
Two aircraft on converging tracks at the same level, one heading 090 and one heading 180. The aircraft heading 090 is to the left of the other's track, so the aircraft heading 180 sees the other on its right and must give way. A quick check: ask whose right side the other aircraft is on.