(1) Before making any sale of such bonds the board shall advertise the sale and invite sealed bids therefor, by publication in the county official newspaper at least once, and in such other manner as it sees fit, for a period of thirty days. At the time and place fixed for receiving bids the board shall open all bids presented and may either award the bonds to the highest bidder or reject all bids. Delivery of the bonds and payment therefor may be as required by the board. The purchaser of any such bonds shall pay the money due therefor to the county treasurer, who shall place it in the district fund.
(2) Notwithstanding subsection (1) of this section, such bonds may be sold in accordance with chapter
39.46 RCW.