Every person seeking to enter Canada must satisfy a border officer that they have the right or authorization to enter. Even if you have a valid visa, the officer at the port of entry makes the final decision.
(1)Every foreign national, other than a foreign national referred to in section 19, who seeks to enter or remain in Canada must establish,(a) to become a permanent resident, that they hold the visa or other document required under the regulations and have come to Canada in order to establish permanent residence; and
(b)to become a temporary resident, that they hold the visa or other document required under the regulations and will leave Canada by the end of the period authorized for their stay.
20.1 (1) The Minister may, by order, having regard to the public interest, designate as an irregular arrival the arrival in Canada of a group of persons if he or she(a) is of the opinion that examinations of the persons in the group, particularly for the purpose of establishing identity or determining inadmissibility — and any investigations concerning persons in the group — cannot be conducted in a timely manner; or(b) has reasonable grounds to suspect that, in relation to the arrival in Canada of the group, there has been, or will be, a contravention of subsection 117(1) for profit, or for the benefit of, at the direction of or in association with a criminal organization or terrorist group.
20.2 (1) A designated foreign national may not apply to become a permanent resident(a) if they have made a claim for refugee protection but have not made an application for protection, until five years after the day on which a final determination in respect of the claim is made;(b) if they have made an application for protection, until five years after the day on which a final determination in respect of the application is made; or(c) in any other case, until five years after the day on which they become a designated foreign national.