The receiver of taxes and county treasurer or director of finance shall deposit in any depository bank in the State at his or her county seat, to the credit of his or her county, all public money received by him or her, within 3 days of the receipt thereof. The same shall remain therein, unless determined by the county government to be idle or surplus and thereupon by order or authorization invested in accordance with § 4122 of this title, or until drawn by him or her in payment of legal demands, or in the transfer thereof to his or her successor.