Section 9--341. Bank's Rights and Duties with Respect to Deposit 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.