The bonded indebtedness incurred by the county and by its magisterial districts for road purposes shall remain the debt of the property originally pledged as security for the payment of the obligation. The county court shall impose upon the property in the county for county obligations, and in the magisterial district for district obligations, levies in the manner provided in sections seven and thirteen, article eight, chapter eleven, as amended, for the payment of the current requirements of principal and interest of the bonded indebtedness on and after July 1, 1933. All county courts, and other bodies acting in lieu thereof, are authorized to transfer to the general county fund any unexpended balances remaining in the county road and bridge funds or in district road funds, other than interest and sinking funds required for bonded indebtedness incurred for road purposes, and to transfer to the general county fund any unexpended balances of funds raised to pay the interest on and create sinking funds for any such bonded indebtedness where said bonded indebtedness has been fully paid off and discharged or where there remains no other bonded debt within such taxing district to which such unexpended balances might be applied, as well as any balance remaining in any special road fund created by law, and all moneys which may hereafter be paid into such funds through the collection of delinquent taxes or otherwise.

When there is in the state sinking fund commission to the combined credit of all district road bonds in any county issued prior to November 8, 1932, a sufficient amount to pay principal and interest on all such outstanding road bonds, the state sinking fund commission is authorized to apply from said balance a sufficient amount to pay all outstanding road bonds of said districts, together with the interest thereon to maturity, and to remit any balances remaining thereafter to the sheriff and treasurer of said county to be credited to the General Fund of the county.