S.C. Code Ann. § 62-5-508: Duty of health care or nursing care provider.

A health care provider or nursing care provider having knowledge of the principal's health care power of attorney has a duty to follow directives of the agent that are consistent with the health care power of attorney to the same extent as if they were given by the principal. If it is uncertain whether a directive is consistent with the health care power of attorney, the health care provider, nursing care provider, agent, or other interested person may apply to the probate court for an order determining the authority of the agent to give the directive.