California Code, Probate Code - PROB § 5002

Notwithstanding any other provision of this part, a holder of property under an instrument of a type described in Section 5000 is not required to receive, hold, or transfer the property in compliance with a provision for a nonprobate transfer on death executed by a person who has an interest in the property if either (1) the person is not authorized by the terms of the instrument to execute a provision for transfer of the property, or (2) the provision for transfer of the property does not otherwise satisfy the terms of the instrument.