Cal. Water Code § 20527.6
(c) As used in this section, “legal representative” means any of the following:
(d) Before a legal representative votes at a district election, he or she shall present to the precinct board a certified copy of his or her authority, which shall be kept and filed with the returns of the election. No appointment of a proxy shall be valid, accepted, or vote allowed thereon at any district election unless it meets all the following requirements: