ATPL Air Law study materials
ATPL Air Law study resources

ATPL Air Law cheat sheet

ATPL Air Law · Keep the key ideas within reach.

Quick reference

International Law and Conventions

  • Chicago Convention (1944) Article 1: every State has complete and exclusive sovereignty over the airspace above its territory, including territorial waters.

  • Territorial sea extends 12 NM from the baseline; the airspace over it is sovereign. The high seas and airspace above them are open to all States.

  • Article 5 (non-scheduled flights) allows transit and stops for non-traffic purposes without prior permission; Article 6 requires special permission for scheduled international air services.

  • Article 8: no manned aircraft may fly over a State's territory without its permission; pilotless aircraft require special authorisation.

  • Article 12: rules of the air over the high seas are those established under the Chicago Convention (Annex 2), with no exception for State aircraft.

  • Five Freedoms: (1) overfly, (2) technical stop, (3) set down traffic, (4) take on traffic, (5) carry traffic between two foreign States; only 1 and 2 are Convention-granted, 3-5 need bilateral agreement.

  • Warsaw/Montreal Convention: carrier liability for death or injury is capped at 128,821 SDR (2019 revision); baggage 1,288 SDR; cargo 22 SDR/kg; delay 5,346 SDR.

  • Tokyo Convention 1963: the State of registry has jurisdiction over offences committed on board; the aircraft commander may restrain a person posing a threat to safety.

  • Rome Convention 1952 governs third-party surface damage caused by foreign aircraft; the operator is liable, with limits set by the aircraft's weight.

Quick reference

Airworthiness of Aircraft

  • ICAO Annex 8 sets minimum airworthiness standards; the State of Registry issues the Certificate of Airworthiness (C of A) for aircraft on its register.

  • A C of A remains valid only if the aircraft is maintained per the approved maintenance programme and all mandatory airworthiness directives are complied with.

  • The C of A is not transferable between registrations; a new State of Registry may validate the existing certificate or issue its own.

  • A Permit to Fly may be issued for aircraft not meeting full airworthiness requirements, subject to restrictions stated on the permit.

  • An aircraft must carry its C of A and, where required, its noise certificate on board; the C of A is a document listed in Annex 8 and typically inspected at ramp checks.

  • Type Certificate and Certificate of Airworthiness are distinct: the type certificate approves the design; the C of A approves the individual aircraft.

  • An airworthiness directive is mandatory; non-compliance invalidates the C of A and renders flight unlawful.

  • Aircraft must be maintained by approved organisations or licensed personnel per the State's maintenance regulations (e.g., EASA Part-M / Part-145).

Quick reference

Aircraft Nationality and Registration Marks

  • Every aircraft engaged in international navigation must have its nationality and registration marks; the State of Registry issues the certificate of registration.

  • Nationality mark: the letter(s) identifying the State (e.g., G- United Kingdom, D- Germany, N- United States, F- France).

  • Registration mark: a group of letters/numbers following the nationality mark; it must be unique within the State of Registry.

  • Marks must be painted or affixed so they are clearly visible; the location and size (heights of letters) are specified in Annex 7 and national rules.

  • For fixed-wing aircraft the marks appear on the fuselage (or equivalent) and on the upper and lower surfaces of the wings; the wing marks are placed on the left half of the lower surface and the right half of the upper surface.

  • The hyphen between nationality and registration marks is part of the marking and must be displayed.

  • The certificate of registration must be carried on board and is a document subject to inspection.

  • Change of ownership or registration requires the marks to be changed accordingly; the aircraft may not be flown internationally under invalid marks.

Quick reference

Personnel Licensing

  • ICAO Annex 1 sets the standards for flight crew, air traffic controllers and maintenance personnel licensing; States issue licences per their national regulations.

  • A pilot licence requires a valid medical certificate of the appropriate class; the medical certificate is part of the licence privileges.

  • Class 1 medical is required for commercial pilots and ATPL holders; Class 2 for private pilots; Class 3 for air traffic controllers.

  • ATPL minimum age 21; CPL minimum 18; PPL minimum 17 (17 for glider/balloon).

  • ATPL knowledge and experience requirements include 1,500 hours total flight time (or approved reductions) and specific night/instrument experience.

  • A rating (type, class, instrument) is endorsed on the licence and defines the privileges; the licence alone does not authorise flight in types not covered.

  • Recency: a pilot may not act as pilot-in-command carrying passengers unless they have completed 3 take-offs and landings in the preceding 90 days in the same type/class.

  • Licences are not valid without the holder meeting the currency and medical requirements; a lapsed medical suspends the privileges.

Quick reference

Rules of the Air

  • An aircraft may not be operated in a negligent or reckless manner so as to endanger life or property; the pilot-in-command is responsible for the safe conduct of the flight.

  • 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.

  • Power-driven aircraft give way to gliders, balloons, airships and aircraft towing; landing aircraft have right of way over aircraft on the ground.

  • VFR minima in controlled airspace (Class C/D/E) at and above 3,050 m AMSL: 8 km flight visibility, 1,500 m horizontal and 300 m vertical distance from cloud.

  • Below 900 m AMSL in Class G: 5 km flight visibility, clear of cloud and in sight of the surface (for aircraft at 140 kt or less).

  • VMC minima at or above 3,050 m: 8 km visibility, 1,500 m horizontally and 300 m vertically from cloud.

  • Minimum safe altitude: 1,000 ft above the highest obstacle within 600 m (2,000 ft in mountainous terrain) for IFR; VFR must remain clear of obstacles.

  • Aircraft on the ground must give way to aircraft landing or in the final stages of an approach; taxiing must yield to aircraft taking off.

  • Anti-collision lights and navigation lights must be used at night and in conditions of poor visibility; landing lights when taking off or landing.

Quick reference

Air Traffic Services and Airspace

  • ICAO airspace classes A-G: A-E are controlled; F is advisory; G is uncontrolled. A = IFR only; B = IFR and VFR with separation for all; C = IFR and VFR with separation IFR/IFR and IFR/VFR; D = IFR and VFR with separation IFR/IFR only; E = IFR and VFR, separation IFR/IFR only.

  • Class F: IFR and VFR, advisory service, no separation; Class G: IFR and VFR, no separation, no clearance required.

  • A clearance is an authorisation to proceed under specified conditions; it does not relieve the pilot of responsibility for terrain clearance or collision avoidance.

  • The pilot-in-command has final authority over the aircraft; ATC instructions must be followed unless an emergency requires deviation, which must be reported.

  • Separation minima: 1,000 ft vertically in RVSM airspace (FL290-FL410); 2,000 ft elsewhere; 5 NM lateral/horizontal in radar environment typically.

  • Position reporting: compulsory reporting points must be reported; the pilot reports when passing a reporting point, on entering/leaving controlled airspace, and when requested.

  • SSR codes: 7700 emergency, 7600 radio failure, 7500 unlawful interference; 7000 VFR in Europe (not universally).

  • ATC clearances and instructions must be read back, including runway, altitude, heading and frequency instructions.

Quick reference

Aeronautical Information and Charts

  • ICAO Annex 15 governs aeronautical information services; the AIP, NOTAM and AIC are the primary publications.

  • The AIP contains permanent information; NOTAMs contain temporary or urgent information; AICs contain information of a temporary nature not covered by NOTAM.

  • Charts: the World Aeronautical Chart (1:1,000,000) and ICAO 1:500,000 charts are standard for navigation; aerodrome charts show runway data and approach procedures.

  • A NOTAM is identified by a series letter and number, and includes the location indicator, validity period and description; it must be checked before flight.

  • The aeronautical information cycle: AIP amendments are issued on a fixed AIRAC cycle (28 days), with effective dates published in advance.

  • Altimeter setting: QNH gives altitude above mean sea level; QFE gives height above the aerodrome reference point; QNE is the standard pressure 1013.25 hPa (29.92 inHg).

  • Transition altitude/level: below the transition altitude use QNH; above the transition level use standard pressure (1013.25 hPa); the transition layer is the space between them.

  • Chart symbols for controlled airspace, prohibited/restricted/danger areas, and radio navigation aids must be interpreted correctly; prohibited areas may not be entered.

Quick reference

Aircraft Operations and Operator Obligations

  • The operator must ensure the aircraft is airworthy, properly equipped and maintained, and that crew are licensed and current before flight.

  • Operational flight plan, fuel policy and mass-and-balance must be completed before departure; the pilot-in-command signs the flight plan.

  • Fuel: sufficient fuel for the flight plus reserves (typically 5% trip fuel contingency, alternate fuel, final reserve of 30 minutes holding for turbine aircraft).

  • Crew duty and flight time limitations: the operator must comply with the State's FTL scheme; records must be kept and made available to the authority.

  • The operator must carry the documents listed in Annex 6: certificate of registration, C of A, licences, journey log, and, where required, the operations manual.

  • Passenger briefing and safety equipment checks are mandatory before take-off; emergency equipment must be serviceable and accessible.

  • The operator must report accidents and serious incidents to the authority; the pilot-in-command reports occurrences per the State's mandatory occurrence reporting scheme.

  • Security: the operator must implement a security programme and ensure screening of passengers and baggage in accordance with Annex 17.

Quick reference

National Law, Licensing and Enforcement

  • National law implements ICAO standards; the State's civil aviation authority issues licences, certificates and approvals and enforces compliance.

  • The State of Registry has jurisdiction over the aircraft and its crew; the State of the Operator has jurisdiction over operations and the operator's certificate.

  • Enforcement actions include warnings, fines, suspension or revocation of licences and certificates, and, in serious cases, criminal prosecution.

  • The pilot-in-command is responsible for compliance with the law and for reporting any accident or serious incident to the authority without delay.

  • Licences may be revoked or suspended for breaches such as flying without a valid medical, operating without a valid C of A, or failing to comply with ATC instructions.

  • The authority may conduct ramp inspections and audits; refusal to cooperate can lead to enforcement action.

  • Appeals against enforcement decisions are made through the national administrative or judicial process, with time limits set by national law.

  • Aircraft registration and airworthiness records must be kept and produced on request; failure to maintain records is an offence under national law.

Quick reference

International Law and Conventions

  • Chicago Convention Article 1: complete and exclusive sovereignty over territory airspace, including territorial waters.

  • Article 5 permits non-scheduled transit and stops for non-traffic purposes without prior permission.

  • Article 6 requires special permission for scheduled international air services.

  • Article 8: no manned aircraft over a State's territory without permission; pilotless aircraft need special authorisation.

  • Five Freedoms: 1 overfly, 2 technical stop, 3 set down, 4 take on, 5 cabotage; only 1 and 2 are Convention-granted.

  • Montreal Convention 1999: carrier liability limited to 128,821 SDR for death/injury, 1,288 SDR baggage, 5,346 SDR delay.

  • Tokyo Convention 1963: State of registry has jurisdiction over on-board offences; commander may restrain a threat.

  • Rome Convention 1952: operator liable for third-party surface damage caused by foreign aircraft.

Quick reference

Airworthiness of Aircraft

  • ICAO Annex 8 sets minimum airworthiness standards; the State of Registry issues the C of A.

  • The C of A is valid only if maintenance is per the approved programme and all airworthiness directives are complied with.

  • The C of A is not transferable; a new State of Registry may validate or reissue it.

  • A Permit to Fly may be issued for aircraft not meeting full requirements, with restrictions stated on the permit.

  • The C of A must be carried on board and produced on request; a noise certificate is required where applicable.

  • Type Certificate approves the design; C of A approves the individual aircraft.

  • An airworthiness directive is mandatory; non-compliance invalidates the C of A.

  • Maintenance must be by approved organisations or licensed personnel per the State's regulations.

Quick reference

Aircraft Nationality and Registration Marks

  • Every aircraft in international navigation must carry nationality and registration marks; the State of Registry issues the certificate of registration.

  • Nationality mark identifies the State (G-, D-, N-, F-); registration mark is unique within the State.

  • Marks must be painted or affixed so they are clearly visible; letter heights are specified in Annex 7 and national rules.

  • Fixed-wing: marks on the fuselage (or equivalent) and on the upper and lower wing surfaces.

  • Wing marks are placed on the left half of the lower surface and the right half of the upper surface.

  • The hyphen between nationality and registration marks is part of the marking and must be displayed.

  • The certificate of registration must be carried on board and is subject to inspection.

  • Change of ownership or registration requires the marks to be changed accordingly.

Quick reference

Personnel Licensing

  • ICAO Annex 1 sets standards for flight crew, ATC and maintenance personnel licensing.

  • A pilot licence requires a valid medical certificate of the appropriate class; the medical is part of the licence privileges.

  • Class 1 for commercial pilots and ATPL; Class 2 for private pilots; Class 3 for air traffic controllers.

  • ATPL minimum age 21; CPL 18; PPL 17.

  • ATPL experience includes 1,500 hours total flight time (or approved reductions).

  • A rating defines the privileges; the licence alone does not authorise flight in types not covered.

  • Recency: 3 take-offs and landings in the preceding 90 days in the same type/class before carrying passengers.

  • A lapsed medical suspends the licence privileges.

Quick reference

Rules of the Air

  • The pilot-in-command is responsible for the safe conduct of the flight; reckless operation endangering life or property is prohibited.

  • Converging same-category aircraft: the one on the right has right of way; head-on: both turn right; overtaking: the overtaken has right of way.

  • Power-driven aircraft give way to gliders, balloons, airships and aircraft towing; landing aircraft have right of way over aircraft on the ground.

  • VFR minima at and above 3,050 m AMSL in controlled airspace: 8 km visibility, 1,500 m horizontal and 300 m vertical from cloud.

  • Below 900 m AMSL in Class G: 5 km visibility, clear of cloud and in sight of the surface (for aircraft at 140 kt or less).

  • Minimum safe altitude: 1,000 ft above the highest obstacle within 600 m (2,000 ft in mountainous terrain) for IFR.

  • Aircraft on the ground give way to landing or approaching aircraft; taxiing yields to taking off.

  • Anti-collision and navigation lights must be used at night and in poor visibility.

Quick reference

Air Traffic Services and Airspace

  • ICAO airspace classes A-G: A-E controlled; F advisory; G uncontrolled.

  • Class A: IFR only; B: IFR and VFR with separation for all; C: IFR and VFR with separation IFR/IFR and IFR/VFR; D: separation IFR/IFR only; E: separation IFR/IFR only.

  • Class F: advisory service, no separation; Class G: no separation, no clearance required.

  • A clearance authorises flight under specified conditions; it does not relieve the pilot of terrain clearance or collision avoidance responsibility.

  • The pilot-in-command has final authority; deviations for emergencies must be reported.

  • RVSM: 1,000 ft vertical separation between FL290 and FL410; 2,000 ft elsewhere.

  • SSR codes: 7700 emergency, 7600 radio failure, 7500 unlawful interference.

  • Clearances and instructions must be read back, including runway, altitude, heading and frequency.

Quick reference

Aeronautical Information and Charts

  • ICAO Annex 15 governs aeronautical information services; AIP, NOTAM and AIC are the primary publications.

  • AIP contains permanent information; NOTAMs contain temporary or urgent information; AICs contain temporary information not covered by NOTAM.

  • Standard charts: World Aeronautical Chart 1:1,000,000 and ICAO 1:500,000 charts; aerodrome charts show runway and approach data.

  • A NOTAM includes the location indicator, validity period and description; it must be checked before flight.

  • AIP amendments are issued on the AIRAC cycle (28 days) with effective dates published in advance.

  • QNH gives altitude above mean sea level; QFE gives height above the aerodrome reference point; QNE is 1013.25 hPa (29.92 inHg).

  • Below the transition altitude use QNH; above the transition level use standard pressure; the transition layer lies between them.

  • Prohibited areas may not be entered; restricted and danger areas carry conditions or warnings.

Quick reference

Aircraft Operations and Operator Obligations

  • The operator must ensure the aircraft is airworthy, properly equipped and maintained, and that crew are licensed and current.

  • Operational flight plan, fuel policy and mass-and-balance must be completed before departure; the pilot-in-command signs the flight plan.

  • Fuel reserves include contingency fuel, alternate fuel and a final reserve (typically 30 minutes holding for turbine aircraft).

  • Crew duty and flight time limitations must comply with the State's FTL scheme; records must be kept.

  • Documents to be carried include the certificate of registration, C of A, licences, journey log and, where required, the operations manual.

  • Passenger briefing and safety equipment checks are mandatory before take-off.

  • Accidents and serious incidents must be reported to the authority; the pilot-in-command reports occurrences.

  • Security: the operator implements a security programme and screening per Annex 17.

Quick reference

National Law, Licensing and Enforcement

  • National law implements ICAO standards; the civil aviation authority issues licences, certificates and approvals.

  • The State of Registry has jurisdiction over the aircraft and crew; the State of the Operator has jurisdiction over operations and the operator's certificate.

  • Enforcement actions include warnings, fines, suspension or revocation of licences and certificates, and criminal prosecution.

  • The pilot-in-command must comply with the law and report accidents or serious incidents without delay.

  • Licences may be revoked or suspended for breaches such as flying without a valid medical or C of A, or failing to comply with ATC instructions.

  • Ramp inspections and audits may be conducted; refusal to cooperate can lead to enforcement action.

  • Appeals against enforcement decisions follow the national administrative or judicial process within set time limits.

  • Registration and airworthiness records must be kept and produced on request; failure is an offence.

Quick reference

International Law and Conventions

  • Chicago Convention Article 1: complete and exclusive sovereignty over territory airspace, including territorial waters.

  • Article 5 permits non-scheduled transit and stops for non-traffic purposes without prior permission.

  • Article 6 requires special permission for scheduled international air services.

  • Article 8: no manned aircraft over a State's territory without permission; pilotless aircraft need special authorisation.

  • Five Freedoms: 1 overfly, 2 technical stop, 3 set down, 4 take on, 5 cabotage; only 1 and 2 are Convention-granted.

  • Montreal Convention 1999: carrier liability limited to 128,821 SDR for death/injury, 1,288 SDR baggage, 5,346 SDR delay.

  • Tokyo Convention 1963: State of registry has jurisdiction over on-board offences; commander may restrain a threat.

  • Rome Convention 1952: operator liable for third-party surface damage caused by foreign aircraft.

Quick reference

Airworthiness of Aircraft

  • ICAO Annex 8 sets minimum airworthiness standards; the State of Registry issues the C of A.

  • The C of A is valid only if maintenance is per the approved programme and all airworthiness directives are complied with.

  • The C of A is not transferable; a new State of Registry may validate or reissue it.

  • A Permit to Fly may be issued for aircraft not meeting full requirements, with restrictions stated on the permit.

  • The C of A must be carried on board and produced on request; a noise certificate is required where applicable.

  • Type Certificate approves the design; C of A approves the individual aircraft.

  • An airworthiness directive is mandatory; non-compliance invalidates the C of A.

  • Maintenance must be by approved organisations or licensed personnel per the State's regulations.

Quick reference

Aircraft Nationality and Registration Marks

  • Every aircraft in international navigation must carry nationality and registration marks; the State of Registry issues the certificate of registration.

  • Nationality mark identifies the State (G-, D-, N-, F-); registration mark is unique within the State.

  • Marks must be painted or affixed so they are clearly visible; letter heights are specified in Annex 7 and national rules.

  • Fixed-wing: marks on the fuselage (or equivalent) and on the upper and lower wing surfaces.

  • Wing marks are placed on the left half of the lower surface and the right half of the upper surface.

  • The hyphen between nationality and registration marks is part of the marking and must be displayed.

  • The certificate of registration must be carried on board and is subject to inspection.

  • Change of ownership or registration requires the marks to be changed accordingly.

Quick reference

Personnel Licensing

  • ICAO Annex 1 sets standards for flight crew, ATC and maintenance personnel licensing.

  • A pilot licence requires a valid medical certificate of the appropriate class; the medical is part of the licence privileges.

  • Class 1 for commercial pilots and ATPL; Class 2 for private pilots; Class 3 for air traffic controllers.

  • ATPL minimum age 21; CPL 18; PPL 17.

  • ATPL experience includes 1,500 hours total flight time (or approved reductions).

  • A rating defines the privileges; the licence alone does not authorise flight in types not covered.

  • Recency: 3 take-offs and landings in the preceding 90 days in the same type/class before carrying passengers.

  • A lapsed medical suspends the licence privileges.

Quick reference

Rules of the Air

  • The pilot-in-command is responsible for the safe conduct of the flight; reckless operation endangering life or property is prohibited.

  • Converging same-category aircraft: the one on the right has right of way; head-on: both turn right; overtaking: the overtaken has right of way.

  • Power-driven aircraft give way to gliders, balloons, airships and aircraft towing; landing aircraft have right of way over aircraft on the ground.

  • VFR minima at and above 3,050 m AMSL in controlled airspace: 8 km visibility, 1,500 m horizontal and 300 m vertical from cloud.

  • Below 900 m AMSL in Class G: 5 km visibility, clear of cloud and in sight of the surface (for aircraft at 140 kt or less).

  • Minimum safe altitude: 1,000 ft above the highest obstacle within 600 m (2,000 ft in mountainous terrain) for IFR.

  • Aircraft on the ground give way to landing or approaching aircraft; taxiing yields to taking off.

  • Anti-collision and navigation lights must be used at night and in poor visibility.

Quick reference

Air Traffic Services and Airspace

  • ICAO airspace classes A-G: A-E controlled; F advisory; G uncontrolled.

  • Class A: IFR only; B: IFR and VFR with separation for all; C: IFR and VFR with separation IFR/IFR and IFR/VFR; D: separation IFR/IFR only; E: separation IFR/IFR only.

  • Class F: advisory service, no separation; Class G: no separation, no clearance required.

  • A clearance authorises flight under specified conditions; it does not relieve the pilot of terrain clearance or collision avoidance responsibility.

  • The pilot-in-command has final authority; deviations for emergencies must be reported.

  • RVSM: 1,000 ft vertical separation between FL290 and FL410; 2,000 ft elsewhere.

  • SSR codes: 7700 emergency, 7600 radio failure, 7500 unlawful interference.

  • Clearances and instructions must be read back, including runway, altitude, heading and frequency.

Quick reference

Aeronautical Information and Charts

  • ICAO Annex 15 governs aeronautical information services; AIP, NOTAM and AIC are the primary publications.

  • AIP contains permanent information; NOTAMs contain temporary or urgent information; AICs contain temporary information not covered by NOTAM.

  • Standard charts: World Aeronautical Chart 1:1,000,000 and ICAO 1:500,000 charts; aerodrome charts show runway and approach data.

  • A NOTAM includes the location indicator, validity period and description; it must be checked before flight.

  • AIP amendments are issued on the AIRAC cycle (28 days) with effective dates published in advance.

  • QNH gives altitude above mean sea level; QFE gives height above the aerodrome reference point; QNE is 1013.25 hPa (29.92 inHg).

  • Below the transition altitude use QNH; above the transition level use standard pressure; the transition layer lies between them.

  • Prohibited areas may not be entered; restricted and danger areas carry conditions or warnings.

Quick reference

Aircraft Operations and Operator Obligations

  • The operator must ensure the aircraft is airworthy, properly equipped and maintained, and that crew are licensed and current.

  • Operational flight plan, fuel policy and mass-and-balance must be completed before departure; the pilot-in-command signs the flight plan.

  • Fuel reserves include contingency fuel, alternate fuel and a final reserve (typically 30 minutes holding for turbine aircraft).

  • Crew duty and flight time limitations must comply with the State's FTL scheme; records must be kept.

  • Documents to be carried include the certificate of registration, C of A, licences, journey log and, where required, the operations manual.

  • Passenger briefing and safety equipment checks are mandatory before take-off.

  • Accidents and serious incidents must be reported to the authority; the pilot-in-command reports occurrences.

  • Security: the operator implements a security programme and screening per Annex 17.

Quick reference

National Law, Licensing and Enforcement

  • National law implements ICAO standards; the civil aviation authority issues licences, certificates and approvals.

  • The State of Registry has jurisdiction over the aircraft and crew; the State of the Operator has jurisdiction over operations and the operator's certificate.

  • Enforcement actions include warnings, fines, suspension or revocation of licences and certificates, and criminal prosecution.

  • The pilot-in-command must comply with the law and report accidents or serious incidents without delay.

  • Licences may be revoked or suspended for breaches such as flying without a valid medical or C of A, or failing to comply with ATC instructions.

  • Ramp inspections and audits may be conducted; refusal to cooperate can lead to enforcement action.

  • Appeals against enforcement decisions follow the national administrative or judicial process within set time limits.

  • Registration and airworthiness records must be kept and produced on request; failure is an offence.