Ontario laws recognize that your known wishes expressed while mentally capable about your future care choices, will be binding on your attorney or other substitute decision-makers, unless they are impossible to follow.
Ontario law does not use the term “living will". Sometimes people use the term “advance directive” to refer to a written statement of wishes about future care.
You can write your treatment wishes (an “advance directive”) as part of your Power of Attorney for Personal Care so that you can be sure your attorney is aware of them. An “advance directive” just addresses your treatment and personal care wishes and does not need to name anyone or be written in any specific way.
A typical direction that many people request to included in their Power of Attorney for Personal Care is something like:
"If the time comes when I can no longer take part in decisions about my own future, and if at such time, I am resident in a chronic care facility or I am suffering from an extreme physical or mental disability from which there is no reasonable expectation that I will recover, it is my wish and direction that I be allowed to die and not be kept alive by medications, artificial means or so-called heroic measures. I do ask, however, that medication be mercifully administered to me to alleviate my suffering, even if such medication may shorten my remaining life. I would ask that my attorney act (and ensure my doctors and other medical personnel act) in a manner consistent with my wishes as so expressed."