61 STAT.] MULTILATERAL-CIVIL AVIATION-DEC. 7, 1944 or authorities of the State in which the aircraft is regis- tered to provide such measures of assistance as may be necessitated by the circumstances. Each contracting State, when undertaking search for missing aircraft, will collaborate in coordinated measures which may be rec- ommended from time to time pursuant to this Con- vention. Article 26 In the event of an accident to an aircraft of a con- If aestgatOn tracting State occurring in the territory of another con- tracting State, and involving death or serious injury, or indicating serious technical defect in the aircraft or air navigation facilities, the State in which the accident occurs will institute an inquiry into the circumstances of the accident, in accordance, so far as its laws permit, with the procedure which may be recommended by the International Civil Aviation Organization. The State in which the aircraft is registered shall be given the opportunity to appoint observers to be present at the inquiry and the State holding the inquiry shall commu- nicate the report and findings in the matter to that State. Article 27 (a) While engaged in international air navigation, any authorized entry of aircraft of a contracting State into the territory of another contracting State or author- ized transit across the territory of such State with or without landings shall not entail any seizure or detention of the aircraft or any claim against the owner or operator thereof or any other interference therewith by or on behalf of such State or any person therein, on the ground that the construction, mechanism, parts, acces- sories or operation of the aircraft is an infringement of any patent, design, or model duly granted or registered in the State whose territory is entered by the aircraft, it being agreed that no deposit of security in connection with the foregoing exemption from seizure or detention of the aircraft shall in any case be required in the State entered by such aircraft. (b) The provisions of paragraph (a) of this Article shall also be applicable to the storage of spare parts and spare equipment for the aircraft and the right to use and install the same in the repair of an aircraft of a con- tracting State in the territory of any othercontracting State, provided that any patented part or equipment so stored shall not be sold or distributed internally in or exported commercially from the contracting State entered by the aircraft. (c) The benefits of this Article shall apply only to such Exemption from seizure on patent claims 1187
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