An attorney may not exercise any authority to sign checks or disburse or withdraw funds from an attorney trust account until the attorney in writing:
(a) Requests the financial institution to designate the account on its records as an attorney trust account, and
(b) Authorizes the financial institution to report to Bar Counsel any dishonored instruments or overdrafts in the account as required by the agreement under Rule 19-411 between the institution and the Commission.