I will start by saying that, from what I understand from this area, every province has different requests, different items that they need to know. Every registry in every province is different in one way or another. To me, the basic questions that the CRA would have are just a consent to give a name and an address, phone number, perhaps an email address, so that the information can be transferred over to the provincial registries.
For anything more detailed than that, I think that's where the variability of each province comes in, where they might need more information to actually get that consent in a legal document. But with regard to the CRA, to me, it's just the name of the individual and contact information.