taking into account the relevant recommendations of the United Nations and the International Civil Aviation Organization, to prevent acts of the nature referred to in paragraph 1 above, including the improvement of security arrangements at airports or by airlines as well as the exchanRe of relevant information, and to this end to take joint and separate action, subject to respect for the purposes and principles of the Charter of the United Nations and for the relevant United Nations declarations, covenants and resolutions and without prejudice to the sovereignty or territorial integrity of any State, in co-operation with the United Nations and the International Civil Aviation Organization, to ensure that passengers, crew and aircraft engaged in civil aviation are not used as a means of extorting advantage of any kind;