(a) An individual authorized to consent to health care for another under section 205, subsection (a), paragraph (2) or subsection (b), paragraphs (2) or (3) of this title, who for a period of time will not be reasonably available to exercise the authority may delegate the authority to consent during that period to another not disqualified under section 209 of this title. The delegation must be in writing and signed and may specify conditions on the authority delegated. Unless the writing expressly provides otherwise, the delegate may not delegate the authority to another.
(b) The delegant may revoke the delegation at any time by notifying orally or in writing the delegate or the health care provider.