(a) Generally. An attorney or law firm may not borrow or pledge any funds required by the Rules in this Chapter to be deposited in an attorney trust account, obtain any remuneration from the financial institution for depositing any funds in the account, or use any funds for any unauthorized purpose.
(b) No Cash Disbursements. An instrument drawn on an attorney trust account may not be drawn payable to cash or to bearer, and no cash withdrawal may be made from an automated teller machine or by any other method. All disbursements from an attorney trust account shall be made by check or electronic transfer.
(c) Negative Balance Prohibited. No funds from an attorney trust account shall be disbursed if the disbursement would create a negative balance with regard to an individual client matter or all client matters in the aggregate.