Said board in such event may provide for the payment of said indebtedness by the issue and sale of notes of the district to an amount equal to said authorized indebtedness which notes shall be payable in such equal installments, not exceeding three in number, as the board shall direct. Such notes may be in any form, including bearer notes or registered notes as provided in RCW
39.46.030. Such notes may be issued and sold in accordance with chapter
39.46 RCW.