Article 3 1.

which have occurred in the territories of the Member States to which the Treaties apply, in accordance with the international obligations of the Member States;

involving aircraft registered in a Member State or operated by an undertaking established in a Member State, which have occurred outside the territories of the Member States to which the Treaties apply, when such investigations are not conducted by another State;

in which a Member State is entitled, according to international standards and recommended practices, to appoint an accredited representative to participate as a State of Registry, State of the Operator, State of Design, State of Manufacture or State providing information, facilities or experts at the request of the State conducting the investigation;

in which a Member State having a special interest by virtue of fatalities or serious injuries to its citizens is permitted by the State conducting the investigation to appoint an expert.