(a) Personal representatives, guardians, conservators, and trustees
are authorized to sell and convey property by attorneys in fact in all
cases where they may lawfully sell and convey in person.
(b) When a personal representative, guardian, conservator, or trustee exercising the authority conferred by subsection (a) of this Code section appoints an attorney in fact by a power of attorney to which Chapter 6B of this title is applicable under Code Section 10-6B-81, the exercise of fiduciary powers by such attorney in fact under such power
of attorney shall be subject to Code Section 10-6B-40.