TRV - Dual Intent - What is Stage One Approval

[sai_chaitanya2001]

Hi,

What is stage-one approval mentioned in the dual-intent page ?
How is sponsor approval for PR application related to TRV ?

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https://www.canada.ca/en/immigration-refugees-citizenship/corporate/publications-manuals/operational-bulletins-manuals/temporary-residents/visitors/dual-intent-applicants.html

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Officers should consider the individual circumstances of a foreign national who is being sponsored for permanent residence as a spouse or common-law partner. Factors to consider include, but are not limited to,

• whether the sponsorship application has been approved
• whether the application for permanent residence has received stage one approval
• to what extent the applicant has retained ties in their home country
• what the applicant’s plan is, should their application for permanent residence be refused

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I applied for TRV for my spouse while I also have an outland sponsorship application in progress. Trying to understand the terms.