C.R.S. § 4-9-323

(a) Except as otherwise provided in subsection (c) of this section, for purposes of determining the priority of a perfected security interest under section 4-9-322 (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: (1) Is made while the security interest is perfected only: (A) Under section 4-9-309 when it attaches; or (B) Temporarily under section 4-9-312 (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 section 4-9-309 or 4-9-312 (e), (f), or (g). (b) Except as otherwise provided in subsection (c) of this section, a security interest is subordinate to the rights of a person that becomes a lien creditor while the security interest is perfected only 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: (1) Without knowledge of the lien; or (2) Pursuant to a commitment entered into without knowledge of the lien. (c) Subsections (a) and (b) of this section 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) Except as otherwise provided in subsection (e) of this section, 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 (2) Forty-five days after the purchase. (e) Subsection (d) of this section 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) Except as otherwise provided in subsection (g) of this section, 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) Subsection (f) of this section 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.