a. When priority based on time of advance. Except as otherwise provided in subsection (c), for purposes of determining the priority of a perfected security interest under § 8.9A-322 (a) (1), perfection of the security interest dates from the time an advance is made to the extent that the security interest secures an advance that:
A. under § 8.9A-309 when it attaches; or
B. temporarily under § 8.9A-312 (e), (f), or (g); and
2. is not made pursuant to a commitment entered into before or while the security interest is perfected by a method other than under § 8.9A-309 or § 8.9A-312 (e), (f), or (g).
b. Lien creditor. Except as otherwise provided in subsection (c), a security interest is subordinate to the rights of a person that becomes a lien creditor to the extent that the security interest secures an advance made more than forty-five days after the person becomes a lien creditor unless the advance is made:
2. pursuant to a commitment entered into without knowledge of the lien.
c. Buyer of receivables. Subsections (a) and (b) do not apply to a security interest held by a secured party that is a buyer of accounts, chattel paper, payment intangibles, or promissory notes or a consignor.
d. Buyer of goods. Except as otherwise provided in subsection (e), a buyer of goods takes free of a security interest to the extent that it secures advances made after the earlier of:
1. the time the secured party acquires knowledge of the buyer’s purchase; or
e. Advances made pursuant to commitment; priority of buyer of goods. Subsection (d) does not apply if the advance is made pursuant to a commitment entered into without knowledge of the buyer’s purchase and before the expiration of the forty-five day period.
f. Lessee of goods. Except as otherwise provided in subsection (g), a lessee of goods takes the leasehold interest free of a security interest to the extent that it secures advances made after the earlier of:
1. the time the secured party acquires knowledge of the lease; or
2. forty-five days after the lease contract becomes enforceable.
g. Advances made pursuant to commitment: priority of lessee of goods. Subsection (f) does not apply if the advance is made pursuant to a commitment entered into without knowledge of the lease and before the expiration of the forty-five day period.