To defray any expense incurred under the provisions of this article the board of chosen freeholders of any such county may, from time to time, borrow money by issuing bonds of the county, which bonds shall run for a term not exceeding twenty years and bear interest at a rate not to exceed six per centum (6%) per annum.
All such bonds shall be issued in accordance with the provisions of article one of chapter one of this Title (s. 40:1-1 et seq.).