The CAPSCA framework is comprised of the Chicago Convention, ICAO Annexes and Assembly Resolutions, as well as the WHO International Health Regulations (IHR 2015).

Chicago Convention (1944):

Article 13. Entry and Clearance regulations

The laws and regulations of a contracting State as to the admission to or departure from its territory of passengers, crew or cargo of aircraft, such as regulations relating to entry, clearance, immigration, passports, customs, and quarantine shall be complied with by or on behalf of such passengers, crew or cargo upon entrance into or departure from, or while within the territory of that State.

Article 14. Prevention of spread of disease

Each contracting State agrees to take effective measures to prevent the spread by means of air navigation of cholera, typhus (epidemic). smallpox, yellow fever, plague, and such other communicable diseases as the contracting States shall from time to time decide to designate, and to that end contracting States will keep in close consultation with the agencies concerned with international regulations relating to sanitary measures applicable to aircraft. Such consultation shall be without prejudice to the application of any existing international convention on this subject to which the contracting States may be parties. 

Article 22. Facilitation and formalities

Each contracting State agrees to take effective Each contracting State agrees to adopt all practicable measures, through the issuance of special regulations or otherwise, to facilitate and expedite navigation by aircraft between the territories of contracting States, and to prevent unnecessary delays to aircraft, crews, passengers and cargo, especially in the administration of the laws relating to immigration, quarantine, customs and clearance.

ICAO Annexes:

• Annex 6 - Operation of Aircraft - Part I. (Sections about medical supplies and cabin crew health and first aid training).
  
• Annex 9 - Facilitation. (Sections about a communicable disease outbreak, aircraft disinsection and disinfection, quarantine at international airports, vaccination certificates). 
  
• Annex 11 - Air Traffic Services. (Section about contingency agreements).
  
• Annex 14 - Aerodromes - Volume I. (Section about Aerodrome emergency planning).
  
• Annex 15 - Aeronautical Information Services. (Section about aeronautical information updates).
  
• Annex 18 - The Safe Transport of Dangerous Goods by Air.
  
• Procedures for Air Navigation Services (PANS) - Air Traffic Management (Doc 4444).
  

ICAO Assembly Resolutions:

• A35-12 (2004): Protection of the Health of Passengers and Crews and the Prevention of the Spread of Communicable Disease through International Travel.
• A37-13 (2010): Prevention of spread of communicable disease through air travel.
• A39-28 (2016): Performance-based criteria and guidance material on aircraft disinsection and vector control measures.
• A40-14 (2019): Mitigation of the spread of disease through, inter alia, aircraft disinsection and vector control methods, and the importance of CAPSCA (Collaborative Arrangement for the prevention and Management of Public Health Events in Civil Aviation) for implementation.
  

International Health Regulations:

• International Health Regulation (IHR 2005) - World Health Organization.