It shall be his duty to receive all moneys belonging to the county from whatever source they may be derived, and other moneys which by law are directed to be paid to him, and all moneys received by him for the use of the county shall be paid by him only on the warrants of the board of county commissioners, drawn according to law, and all other moneys shall be paid over by him as provided by law. Counties may implement a direct deposit system to have warrants transferred electronically to a financial institution. The State Auditor and Inspector shall promulgate rules as necessary for the implementation and administration of a direct deposit system.