thank you for clarifying. It is a relief to know in most cases medical are extended and if in the category M1 which I think we both fall under.1. If you are asked for new medicals for your spouse, then as per the protocol she will not be able to provide a chest x-ray.
See See https://www.cic.gc.ca/english/helpcentre/answer.asp?qnum=987&top=4
https://www.canada.ca/content/dam/ircc/migration/ircc/english/department/partner/pp/pdf/imm5733e.pdf
Unless the X-ray is provided, the medical results will not be processed.
2. However, this is only if a remed is requested. In many cases IRCC is extending the medicals as per policy. See my previous post on this at #13,193
3. Currently, you cannot get upfront medicals done. As per the new policy in place, panel physicians have been asked not to give appointments unless the applicants has a letter from IRCC. If IRCC asks you to get new medicals, you will be sent a medical requisition letter.
However, our medical expired Aug 2020 and Dec 2020, that is more than 6-10months already and counting. Do you think the number of months expired will be a big consideration whether they will extend medical or request for remedical?