All revenue bonds issued under authority of this act shall be sold, executed and delivered in the same manner as provided by the municipal bond law for the sale of general obligation bonds, except that issues of revenue bonds may, in the discretion of the directors, be sold at a private sale without advertising the same at competitive bidding and at a price above, at, or below par. The resolution authorizing the issuance of bonds shall prescribe the form of bonds. The bonds shall bear interest at a rate or rates, payable annually, or at lesser intervals as may be prescribed by resolution; may be in one (1) or more series, bear the date or dates, mature at the time or times, and be redeemable before maturity at the option of the district; may be payable in the medium of payment, at the place or places, may carry registration privileges, may be subject to the terms of redemption, may contain the terms, covenants and conditions, and may be in the form as the resolution may provide. Pending preparation of the bonds, interim certificates in the form and with the provisions as the directors may determine may be issued. Bonds and interim certificates shall be fully negotiable within the meaning of and for all the purposes of the negotiable instruments law.