(a) This [Act] does not affect an action or proceeding commenced before this [Act] takes effect.
(b) If a security interest in a security is perfected at the date this [Act] takes effect, and the action by which the security interest was perfected would suffice to perfect a security interest under this [Act], no further action is required to continue perfection. If a security interest in a security is perfected at the date this [Act] takes effect but the action by which the security interest was perfected would not suffice to perfect a security interest under this [Act], the security interest remains perfected for a period of four months after the effective date and continues perfected thereafter if appropriate action to perfect under this [Act] is taken within that period. If a security interest is perfected at the date this [Act] takes effect and the security interest can be perfected by filing under this [Act], 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.