Cal. Commercial Code § 8603

(a) This division does not affect an action or proceeding commenced before this division becomes operative. (b) If a security interest in a security is perfected at the date this division becomes operative, and the action by which the security interest was perfected would suffice to perfect a security interest under this division, no further action is required to continue perfection. If a security interest in a security is perfected at the date this division takes effect but the action by which the security interest was perfected would not suffice to perfect a security interest under this division, the security interest remains perfected for a period of four months after the operative date and continues perfected thereafter if appropriate action to perfect under this division is taken within that period. If a security interest is perfected at the date this division becomes operative and the security interest can be perfected by filing under Division 9 (commencing with Section 9101), a financing statement signed by the secured party instead of the debtor may be filed within that period to continue perfection or thereafter to perfect and that financing statement shall contain a statement that it is being filed pursuant to this section.