(a) Subordination of security interest in transferred collateral. Except as otherwise provided in subsection (b) of this section, a security interest created by a debtor is subordinate to a security interest in the same collateral created by another person if:

1. (1) The debtor acquired the collateral subject to the security interest created by the other person;
2. (2) The security interest created by the other person was perfected when the debtor acquired the collateral; and
3. (3) There is no period thereafter when the security interest is unperfected.

(b) Limitation of subsection (a) subordination. Subsection (a) of this section subordinates a security interest only if the security interest:

1. (1) Otherwise would have priority solely under section 9-322(a) or 9-324; or
2. (2) Arose solely under section 2-711(3) or 2A-508(5).