K.S.A. 19-28,102

Such county bonds, if authorized according to the provisions of this act, shall be negotiable in form and provide for payment of principal and interest within twenty (20) years. Interest on such bonds shall be payable semi-annually at a rate of not to exceed the maximum rate of interest prescribed by K.S.A. 10-1009 , such board of county commissioners is authorized to fix the denominations of bonds to be issued and the rate of interest that the bonds will bear and advertise the same for public sale in the usual manner as provided in the general bond law.