The essence of the answer is that the patient who is asking for medically assisted death would have to be able to provide a very detailed history, or a detailed history must be able to be provided about them. That would often come from multiple sources. For patients with psychiatric and mental health disorders, often this is through collateral investigations through psychologists, through a detailed review of patient records, through collaboration with previous family physicians, counsellors, family members, etc. in order for a psychiatrist to come up with an overall diagnostic impression and to be able to assess whether or not all of the avenues have been explored reasonably to ensure that this patient has been using or has attempted to use all of the appropriate treatments for them.
As Dr. Green mentioned, it's not a snap decision. These are track two patients, and it's going to take months to evaluate many of these people to try to figure out if they're eligible.