The Authority shall biennially designate a national or State bank or banks as depositories of its money. Those depositories shall be designated only within the State and upon condition that bonds approved as to form and surety by the Authority and at least equal in amount to the maximum sum expected to be on deposit at any one time shall be first given by the depositories to the Authority, those bonds to be conditioned for the safekeeping and prompt repayment of the deposits. When any of the funds of the Authority shall be deposited by the treasurer in any such depository, the treasurer and the sureties on his official bond shall, to that extent, be exempt from liability for the loss of any of the deposited funds by reason of the failure, bankruptcy, or any other act or default of the depository. However, the Authority may accept assignments of collateral by any depository of its funds to secure the deposits to the same extent and conditioned in the same manner as assignments of collateral are permitted by law to secure deposits of the funds of any city.