Section 4154 Of Chapter 3. Modification And Revocation Of Powers Of Attorney From California Probate Code >> Division 4.5. >> Part 2. >> Chapter 3.

. (a) If after executing a power of attorney the principal's marriage to the attorney-in-fact is dissolved or annulled, the principal's designation of the former spouse as an attorney-in-fact is revoked.
  (b) If the attorney-in-fact's authority is revoked solely by subdivision (a), it is revived by the principal's remarriage to the attorney-in-fact.