Can a substitute decision-maker's decision be overridden?
Yes. If a substitute decision-maker decides that life-sustaining treatment should be withheld or withdrawn, the decision will only be followed by a health professional if he or she believes that commencing or continuing the treatment would not be good medical practice. This means that if the health professional believes the life-sustaining treatment should continue because it is good clinical practice, then the substitute decision-maker’s decision to withhold or withdraw the treatment will be overruled.