Disclosure of any written agreement between the deceased spouse and the surviving spouse providing for a non pro rata division of the aggregate value of the community property assets or quasi-community property assets, or both, or the affirmative statement that this agreement does not exist. If a dispute arises as to the division of the community property assets or quasi-community property assets, or both, pursuant to this agreement, the court shall determine the division subject to terms and conditions or other remedies that appear equitable under the circumstances of the case, taking into account the rights of all interested persons.
Ca. Prob. Code § 13651