Section 4503 Of Chapter 1. General Provisions From California Probate Code >> Division 4.5. >> Part 4. >> Chapter 1.

. (a) Subject to subdivision (b), a power of attorney may expressly eliminate the authority of a person listed in Section 4540 to petition the court for any one or more of the purposes enumerated in Section 4541 if both of the following requirements are satisfied:
  (1) The power of attorney is executed by the principal at a time when the principal has the advice of a lawyer authorized to practice law in the state where the power of attorney is executed.
  (2) The principal's lawyer signs a certificate stating in substance: