(1) Such utility revenue obligations shall be sold and delivered in such manner, at such rate or rates of interest and for such price or prices and at such time or times as the commission shall deem for the best interests of the district. The commission may, if it deem it to the best interest of the district, provide in any contract for the construction or acquisition of the public utility, or the additions or betterments thereto or extensions thereof, that payment therefor shall be made only in such revenue obligations at the par value thereof.
(2) Notwithstanding subsection (1) of this section, such obligations may be issued and sold in accordance with chapter 39.46 RCW.