California Code
CHAPTER 4 - Notice of Proposed Action Procedure
Section 10584.

10584. (a) A waiver or consent may be revoked only in writing and is effective only when the writing is received by the personal representative.

(b) A copy of the revocation may be filed with the court, but the effectiveness of the revocation is not dependent upon a copy being filed with the court.

(Enacted by Stats. 1990, Ch. 79.)