Except as otherwise provided in section 9‑1340, subsection (3), and unless the bank otherwise agrees in a signed record, a bank's rights and duties with respect to a deposit account maintained with the bank are not terminated, suspended or modified by:
(1). The creation, attachment or perfection of a security interest in the deposit account;
(2). The bank's knowledge of the security interest; or
(3). The bank's receipt of instructions from the secured party.