You should contact the transfer agent for the exact requirements. That said, California does not appear to have a waiver requirement.
There is no inheritance tax in California so this form should not be required.
Any individual seeking legal advice for their own situation should retain their own legal counsel as this response provides information that is general in nature and not specific to any person's unique situation. Circular 230 Disclaimer - Advice given in this response cannot be used to eliminate penalties with the IRS or any other governmental agency.