Account.
Except as otherwise provided in Section 9--340 (c), and unless the bank otherwise agrees in an authenticated record, a bank's rights and duties with respect to a deposit account maintained with the bank are not terminated, suspended, or modified by:
(a) the creation, attachment, or perfection of a security
interest in the deposit account;
(b) the bank's knowledge of the security interest; or
(c) the bank's receipt of instructions from the secured party.