Tennessee Code Title 34. Guardianship § 34-6-208

(a) Subject to any limitations stated in the durable power of attorney for health care, and, subject to subsection (b) and §§ 34-6-210 -- 34-6-212, a health care provider is not subject to criminal prosecution, civil liability or professional disciplinary action except to the same extent as would be the case if the principal, having had the capacity to give informed consent, had made the health care decision on the principal's own behalf under like circumstances, if the health care provider relies on a health care decision and both of the following requirements are satisfied:

(b) Nothing in this part authorizes a health care provider to do anything illegal.

(c) Notwithstanding the health care decision of the attorney in fact designated by a durable power of attorney for health care, the health care provider is not subject to criminal prosecution, civil liability, or professional disciplinary action for failing to withdraw health care necessary to keep the principal alive.