Massachusetts Medical Society
A legally enforceable declaration can be executed only 14 days or more after a person is diagnosed as having a terminal illness, defined as one that will cause the patient's death "imminently," whether or not life-sustaining procedures are continued. [...]even though this statute was inspired by her story, it would not have helped Quinlan, because she was not terminally ill.
George J. Annas,
The Health Care Proxy and the Living Will
New England Journal of Medicine
Available at: https://scholarship.law.bu.edu/faculty_scholarship/1297