No county governing body shall order any warrant issued for any purpose other than the payment of a claim received, audited and approved as required by § 15.2-1243. No clerk, deputy clerk, chairman or acting chairman of any county governing body shall sign or countersign any warrant not ordered issued by the governing body pursuant to § 15.2-1243. No county governing body shall expend in any year for any purpose an amount greater than the amount available for such purpose during the year or order issued against any fund at any time any warrant in excess of the amount available in such fund and in the treasurer’s possession at the time such warrant is issued, taking into account all previously issued and outstanding warrants payable from such fund. No interest shall be paid on any county warrant. Any clerk, deputy clerk or member of any county governing body who violates any of the provisions of this section shall be guilty of a misdemeanor, and in addition shall be guilty of malfeasance in office.