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Except as expressly provided for in the present convention, aircraft shall be exempt from sanitary formalities at the aerodromes both of call and of final destination.

The diseases which are the subject of the special measures prescribed by this part of the convention are: Plague, cholera, yellow fever, exanthematous typhus, and smallpox.

For the purposes of the present convention, the period of incubation is reckoned as:
 * 6 days in the case of plague;
 * 5 days in the case of cholera;
 * 6 days in the case of yellow fever;
 * 12 days in the case of exanthematous typhus; and
 * 14 days in the case of smallpox.

The chief health authorities shall transmit to the sanitary and authorized aerodromes of their respective countries all information contained in the epidemiological notifications and communications received from the Office International d’Hygiène Publique (and the regional bureaus with which it has made agreements for this purpose) in execution of the provisions of the International Sanitary Convention of June 21, 1926, which may affect the exercise of sanitary control in those aerodromes.

The chief Measures prescribed in this part of the convention shall be regarded as constituting a maximum, within the limits of which