In the field of medicine, a healthcare proxy (commonly referred to as HCP) is a document (legal instrument) with which a patient (primary individual) appoints an agent to legally make healthcare decisions on behalf of the patient, when the patient is incapable of making and executing the healthcare decisions stipulated in the proxy. Once the healthcare proxy is effective, the agent continues making healthcare decisions as long as the primary individual is legally competent to decide. Moreover, in legal-administrative functions, the healthcare proxy is a legal instrument akin to a "springing" healthcare power of attorney. The proxy must declare the healthcare agent who will gain durable power attorney. This document also notifies of the authority given from the principal to the agent and states the limitations of this authority.