(a) Subordination of security interest in transferred collateral.--Except as otherwise provided in subsection (b), a security interest created by a debtor is subordinate to a security interest in the same collateral created by another person if:
(1) the debtor acquired the collateral subject to the security interest created by the other person;
(2) the security interest created by the other person was perfected when the debtor acquired the collateral; and
(3) there is no period thereafter when the security interest is unperfected.
(b) Limitation of subsection (a) subordination.--Subsection (a) subordinates a security interest only if the security interest:
(1) otherwise would have priority solely under section 9322(a) (relating to general priority rules) or 9324 (relating to priority of purchase-money security interests); or
(2) arose solely under section 2711(c) (relating to security interest of buyer in rejected goods) or 2A508(e) (relating to security interest in goods in lessee's possession).