(1) The medical officer shall offer vaccination to any person on board or disembarking from the aircraft who does not show sufficient evidence of protection by a previous attack of smallpox or who does not satisfy the medical officer that he possesses a valid International Vaccination Certificate.
(2) The medical officer may either—
(a)place under surveillance any person who disembarks, the period of surveillance being reckoned from the date on which the medical officer considers the person was last exposed to infection; or
(b)if he considers any such person is not sufficiently protected against smallpox, isolate him for a similar period.
(3) The medical officer shall require the disinfection of the baggage of any infected person, and of any other article on board and any part of the aircraft which the medical officer considers to be contaminated.