The bonds or notes shall be sold by the Treasurer within 60 days after receipt of a certified copy of the authority’s resolution authorizing the sale of the bonds, except that the authority may, at its discretion, adopt a resolution extending the 60-day period. The sale may be a public or private sale, and for such price or prices and on such terms and conditions, as the authority determines, after giving due consideration to the recommendations of any participating party to be assisted from the proceeds of the bonds. Pending preparation of the definitive bonds, the Treasurer may issue interim receipts, certificates, or temporary bonds which shall be exchanged for definitive bonds. The Treasurer may sell any bonds at a price below the par value if the discount on any bonds sold does not exceed 6 percent of the par value.