1906 C01,VENTION-COMMERCIAL AVIATION. FEBRUARY 20.1928. the nearest competent authority and hold himself, crew, passengers and cargo at the point of landing until proper entry has been granted by such competent authority, unless communication therewith is impracticable within twenty-four hours. Aircraft of one of the contracting states which flies over the terri- tory of another contracting state shall be obliged to land as soon as ordered to do so by means of the regulation signals, when for any reason this may be necessary. A~plicatiOD 01 lmml- In the cases provided for in this article, the aircraft, aircraft com- Fa!\~D, customs, etc., mander, crew, passengers and cargo shall be subject to such immi- gration, emigration customs, police, quarantine or sanitary ir.spec- tion as the duly aut!torized representatIves of the subjacent state may make in accordance with its laws. Postal aircraft, etc. InspectiOD, etc. ARTICLE XIX As an exception to the general rules, postal aircraft and aircraft belonging to aerial transport companies regularly constituted and authorized may be exempted, at the option of the subjacent state from the obligation of landing at an airdrome designated as a port 01 entry and authorized to land at certain inland airdromes, desIgnated by the customs and police administration of such state, at which customs formalities sliall be complied with. The departure of such aircraft from the state visited may be regulated in a similar manner. However, sucb aircraft shall follow the normal air route, and make their identity lmown by signals agreed upon as they fly across the frontier. AJmCLE XX From the time of landing of a foreign aircraft at any/oint what- ever until its departure the authorities of the state visite shall have, in all cases, the right to visit and examine the aircraft and to verify all documents with which it must be provided, in order to determine that all the laws, rules and regulatIons of such states and all the provisions of this convention are complied with. ARTICLE XXI Dillchargina passeD· The aircraft of a contracting state engaged in international flir gers and cargo. commerce shall be permitted to discharge passengers and a part of its cargo at one of the airports designated as a port of entry of any other contracting state, and to proceen to any other airport or airports in such state for the purpose of dischargmg the remaining passengers and portions of such cargo and in like manner to take on passengers and load cargo destined for a foreign state or states, provided that they comply with the legal requirements of the count~ over which they fly, which legal requirements shall be the same for native and fore~ aircraft engaged in international traffic and shall be com- munIcated in due course to the contracting states and to the Pan American Union. .A Jm:CLE XXII PrelereDtI~l treat· Each contracting state shall have the right to establish reservation.o;
- ~~ to national air· and restrictions in favor of its own national aircraft in regard to the
commercial transportation of passengers and merchandise between two or more points in its territory, and to other remunerated aero- nautical operations wholly within its territory. Such reservations and restrictions shall be Immediately published and communicated to the other contracting states and to the Pan American Union.
