(2)__With respect to goods covered by a certificate of title issued by this State, a secured party may perfect a security interest in the goods by taking possession of the goods only in the circumstances described in Section 9-1316, subsection (4).

(3)__With respect to collateral other than certificated securities and goods covered by a document, a secured party takes possession of collateral in the possession of a person other than the debtor, the secured party or a lessee of the collateral from the debtor in the ordinary course of the debtor's business, when:

(a)__The person in possession authenticates a record acknowledging that it holds possession of the collateral for the secured party's benefit; or

(b)__The person takes possession of the collateral after having authenticated a record acknowledging that it will hold possession of collateral for the secured party's benefit.

(4)__If perfection of a security interest depends upon possession of the collateral by a secured party, perfection occurs no earlier than the time the secured party takes possession and continues only while the secured party retains possession.

(5)__A security interest in a certificated security in registered form is perfected by delivery when delivery of the certificated security occurs under section 8-1301 and remains perfected by delivery until the debtor obtains possession of the security certificate.

(6)__A person in possession of collateral is not required to acknowledge that it holds possession for a secured party's benefit.

(7)__If a person acknowledges that it holds possession for the secured party's benefit:

(a)__The acknowledgment is effective under subsection (3) or section 8-1301, subsection (1), even if the acknowledgment violates the rights of a debtor; and

(b)__Unless the person otherwise agrees or law other than this Article otherwise provides, the person does not owe any duty to the secured party and is not required to confirm the acknowledgment to another person.