I believe I already mentioned everything you bring up with my rationale above. Airline check in wouldn't talk to CBSA but the embassy where you are located for approval, already been through that once, and they were good to go but that was before they brought in the "Essential Need" requirement. We ended up having them refused exit from the country by the local immigration because of government travel restrictions here. But that isn't what I am asking about, it's on the Cdn end I am thinking about.What’s the definition of elderly anyway as it can differ based on perception. 60 plus, 70 plus 80 plus ? So you show an id and a birth certificate , then you need show how you are related. Is she a widow or a divorcee or a spinster might be next to show maybe living alone. Is she in the vulnerable category confined to her home during current emergency or is she relatively healthy, independent.
Assume anyway your isolation plan does not involve moving in with your mother straight away.
The challenge really is to get past the airline checkin given they are paranoid about letting people travel who do not satisfy the exemption criteria and seems like a lot of personal info to share with a checkin agent who if in doubt will seek guidance from Canada immigration directly.
Our plan has our isolation far away from my Mother place. Thanks