coming from regions where yellow fever exists, provided that the provisions of section II of this chapter, particularly those concerning the measures to be taken on departure, are observed there.
article 49
Nevertheless, the High Contracting Parties may designate particular sanitary aerodromes as those at which aircraft from territories where yellow fever exists shall land for the purpose of disembarking passengers, crew, or cargo.
SECTION IV
article 50
Territories where conditions unfavorable to development. In territories or regions where the conditions do not permit of the development of yellow fever, aircraft coming from regions where yellow fever exists may land on any sanitary or authorized aerodrome.
article 51
Measures to be taken on arrival. The measures to be taken on arrival are the following:
1. Inspection of the aircraft and cargo to insure that they do not contain mosquitoes and, if necessary, disinsectization;
2. Medical inspection of passengers and crew.
CHAPTER III
General provisions.General Provisions
article 52
Surveillance of persons exposed to risk of infection.
Persons who arrive in aircraft in the territory of any High Contracting Party, and who have been exposed to risk of infection by one of the diseases referred to in article 18 Ante, p. 3287of the present convention and who are within the