The laws of the state of Idaho as they now exist, or as they may hereafter be amended or enacted in relation to drainage districts providing the form of bond to be issued, the issuance, registration and sale thereof, the levies to pay interest thereon and to create a sinking fund for the payment and redemption thereof, and for collection of such levies and for the calling and payment of said bonds shall govern and apply to the refunding bonds issued under the provisions of this chapter, when not in conflict herewith.