(a) [Continuing priority over lien creditor: perfection requirements satisfied.]
A security interest that is enforceable immediately before this [Act] takes effect and would have priority over the rights of a person that becomes a lien creditor at that time is a perfected security interest under this [Act] if, when this [Act] takes effect, the applicable requirements for enforceability and perfection under this [Act] are satisfied without further action.
(b) [Continuing priority over lien creditor: perfection requirements not satisfied.]
Except as otherwise provided in Section 9-705, if, immediately before this [Act] takes effect, a security interest is enforceable and would have priority over the rights of a person that becomes a lien creditor at that time, but the applicable requirements for enforceability or perfection under this [Act] are not satisfied when this [Act] takes effect, the security interest:
(1) is a perfected security interest for one year after this [Act] takes effect;
(2) remains enforceable thereafter only if the security interest becomes enforceable under Section 9-203 before the year expires; and
(3) remains perfected thereafter only if the applicable requirements for perfection under this [Act] are satisfied before the year expires.