11 Any person arriving in Canada
(a) from a place outside Canada that, in the opinion of a quarantine officer, is infected or suspected of being infected with yellow fever, or
(b) on board a conveyance in which, in the opinion of a quarantine officer,
(i) there are vectors of yellow fever, or
(ii) there is a case or suspected case of yellow fever,
and proceeding to an area where vectors of yellow fever are present within the incubation period for that disease shall, when required by a quarantine officer, produce evidence satisfactory to the officer that such person has been vaccinated against yellow fever within the 10 years immediately preceding his arrival in Canada.
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