Mr. Chair, that's where the second portion of the “Authorized representatives” kicks in:
The rights and recourses provided under this Act may be exercised
(b) on behalf of an individual, other than a minor, under a legal incapacity by a person authorized by law to administer the affairs or property of that individual;
These would be legal determinations made on someone who has been determined by the courts to no longer be capable of managing their affairs and for which there would be an appointee who would be governed by that.