The law says
IRPR r. 127127 For the purposes of Part 5, a foreign national who makes an application as a member of the spouse or common-law partner in Canada class and their accompanying family members shall not become a permanent resident unless a sponsorship undertaking in respect of the foreign national and those family members is in effect and the sponsor who gave that undertaking still meets the requirements of section 133 and, if applicable, section 137.
Provisions this one cites
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