The following rules govern priority among conflicting security interests in the same deposit account:
1. A security interest held by a secured party having control of the deposit account under section 554.9104 has priority over a conflicting security interest held by a secured party that does not have control.
2. Except as otherwise provided in subsections 3 and 4, security interests perfected by control under section 554.9314 rank according to priority in time of obtaining control.
3. Except as otherwise provided in subsection 4, a security interest held by the bank with which the deposit account is maintained has priority over a conflicting security interest held by another secured party.
4. A security interest perfected by control under section 554.9104, subsection 1, paragraph “c”, has priority over a security interest held by the bank with which the deposit account is maintained.
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