(a) The County Council may reject any and all bids, but in awarding the sale of the bonds, or any of them, they shall be sold to the person, persons, firm or corporation which, in the judgment of the County Council, offers the most advantageous terms.
(b) The bonds shall not be offered for sale until the County Attorney has submitted the County Attorney's opinion in writing that the bonds will, when duly sold, executed, delivered and paid for, be validly issued in accordance with the provisions of this chapter.