(1) The district board may also, if in accordance with the adopted method of financing the local improvement district, issue and sell at par and accrued interest coupon or registered warrants payable within three years from the date thereof exclusively from the local improvement fund of the district. The coupon or registered warrants shall bear semiannual interest and shall be in such form as the board determines and shall state on their face that they are payable exclusively from the local improvement fund of the district. Interest shall be payable on the first day of January and of July. Such warrants may be registered as provided in RCW 39.46.030.
(2) Notwithstanding subsection (1) of this section, such warrants may be issued and sold in accordance with chapter 39.46 RCW.