Can an agent for healthcare decisions override the patient’s wishes outlined on a POST that has been signed by the patient, but not by a physician?

The POST is only completed upon verbal order of the patient’s physician. It, therefore, becomes legally valid when it is signed by the patient. The POST is signed by the patient when he is capable of making healthcare decisions, and it constitutes written evidence of his preferences for end-of-life care. His agent is legally obligated to follow those preferences. ... more