(a) A secured party has control of a deposit account if any of the following conditions is satisfied:

1. (1) The secured party is the bank with which the deposit account is maintained.
2. (2) The debtor, secured party, and bank have agreed in a signed record that the bank will comply with instructions originated by the secured party directing disposition of the funds in the deposit account without further consent by the debtor.
3. (3) The secured party becomes the bank’s customer with respect to the deposit account.

4. (4) Another person, other than the debtor, satisfies either of the following conditions:

   1. (A) The person has control of the deposit account and acknowledges that it has control on behalf of the secured party.
   2. (B) The person obtains control of the deposit account after having acknowledged that it will obtain control of the deposit account on behalf of the secured party.