The mission of the Office of the NAA is established by Law No. 28/2013 of 12 April, as following:
To process diplomatic clearance requests for foreign aircraft overflights and landings, after their submission to the Ministry of Foreign Affairs;
To send to the Ministry of Foreign Affairs, for appropriate action, the national aircraft diplomatic clearance requests for overflights and landings;
To issue airworthiness certificates for military aircraft;
To regulate air traffic management and air navigation services, at the military level, and to set the rules of operation in airspace for military aircraft, with the required inspection and supervision;
To ensure the national representation in military aviation international fora and the national and international civil-military fora, with clearance from the Ministry of Foreign Affairs, when required;
To regulate the Search and Rescue Service;
To participate in the definition and development of the national and international aviation policy;
To certify personnel performing military aviation tasks;
To certify the national entities within the airworthiness of military aircraft;
To certify military aerodrome infrastructures;
To regulate the policing of the national airspace;
To issue registrations to military aircraft.