Section 4231 Of Article 2. Duties Of Attorneys-in-fact From California Probate Code >> Division 4.5. >> Part 2. >> Chapter 4. >> Article 2.

. (a) Except as provided in subdivision (b), in dealing with property of the principal, an attorney-in-fact shall observe the standard of care that would be observed by a prudent person dealing with property of another and is not limited by any other statute restricting investments by fiduciaries.
  (b) An attorney-in-fact who has special skills or expertise or was designated as an attorney-in-fact on the basis of representations of special skills or expertise shall observe the standard of care that would be observed by others with similar skills or expertise.