Example 2: SPX holds a perfected-by-filing security interest in X Corp's existing and after-acquired inventory, and SPZ holds a perfected-by-filing security interest in Z Corp's existing and after-acquired inventory. Z Corp becomes bound as debtor by X Corp's security agreement. Subsequently, Z Corp acquires a new item of inventory. Under Section 9-508 [Maine cite section 9- 1508], SPX's financing statement is effective to perfect a security interest in the new item of inventory in which Z Corp has rights. However, because SP-Z's security interest was perfected by another method, subsection (a) [Maine cite subsection (1)] provides that SPX's security interest is subordinate to SPZ's, regardless of which financing statement was filed first. This would be the case even if SP-Z filed after Z Corp became bound by X Corp's security agreement.

3. Other Priority Rules. Subsection (b) [Maine cite subsection (2)] addresses the priority among security interests created by the original debtor (X Corp). By invoking the other priority rules of this subpart, as applicable, subsection (b) [Maine cite subsection (2)] preserves the relative priority of security interests created by the original debtor.

Example 3: Under the facts of Example 2, SPY also holds a perfected-by-filing security interest in X Corp's existing and after-acquired inventory. SPY filed after SPX. Inasmuch as both SP-X's and SP-Y's security interests in inventory acquired by Z Corp after it became bound are perfected solely under Section 9- 508 [Maine cite section 9-1508], the normal priority rules determine their relative priorities. Under the "first-to-file- or-perfect" rule of Section 9-322(a)(1) [Maine cite section 9- 1322, subsection (1), paragraph (a)], SPX has priority over SPY.

Example 4: Under the facts of Example 3, after Z Corp became bound by X Corp's security agreement, SP-Y promptly filed a new initial financing statement against Z Corp. At that time, SP-X's security interest was perfected only by virtue of its original filing against X Corp which was "effective solely under Section 9508 [Maine cite section 9-1508]." Because SP-Y's security interest no longer is perfected by a financing statement