To carry out passenger and baggage screening of all international aircraft passenger services and of such other services where the service or the screening is judged advisable by the Director of Civil Aviation and, where necessary, to undertake searches of passengers, baggage, cargo, aircraft, aerodromes, and navigation installations;

To carry out aerodrome security patrols and patrols of navigation installations;

To review, inquire into, and keep itself informed on security techniques, systems, devices, practices, and procedures related to the protection of Civil Aviation and persons employed in or using it;

To undertake, or encourage or supervise, such experimental or research work in respect of any aspect of aviation security as the Director may specify;

For the purpose of better carrying out any of its functions under this Act, to co-operate with the Police, Government Departments, airport authorities, operators, and authorities administering the airport security services of other countries, and with any appropriate international organisation;

To exercise and perform such other functions and duties as may be conferred upon it by any enactment. (Section 80, Civil Aviation Act 1990).

Control access and prevent unauthorised entry to security areas on aerodromes and navigation installations and maintain a constant response to remove from such areas any unauthorised persons who enter therein, and maintain vigilance to ensure the security and safety of all persons using the aerodromes or navigation installations;

Operate the National Airport Identity Card System and maintain the database pertaining to it;

Carry out such other security services as may be requested by airline operators;

Collect, evaluate and analyse information which may be potentially significant to aviation security planning.