NRS 268.554
Refunding.
1.
Any bonds issued under the provisions of NRS 268.512 to 268.568, inclusive, and at any time outstanding may at any time and from time to time be refunded by a city by the issuance of its refunding bonds in such amount as the governing body may deem necessary to refund the principal of the bonds to be so refunded, any unpaid interest thereon and any premiums and incidental expenses necessary to be paid in connection therewith.2.
Any such refunding may be effected, whether the bonds to be refunded have matured or thereafter mature, either by sale of the refunding bonds and the application of the proceeds thereof, directly or indirectly, to the payment of the bonds to be refunded thereby, or by exchange of the refunding bonds for the bonds to be refunded thereby, but the holders of any bonds to be so refunded shall not be compelled, without their consent, to surrender their bonds for payment or exchange prior to the date on which they are payable by maturity date, option to redeem or otherwise, or if they are called for redemption, prior to the date on which they are by their terms subject to redemption by option or otherwise. Except to the extent expressly or impliedly inconsistent with the terms of NRS 268.512 to 268.568, inclusive, the provisions of the Local Government Securities Law shall govern the issuance of such refunding bonds and the establishment of any escrow in connection therewith.3.
All refunding bonds, issued under authority of this section, shall be payable solely from revenues out of which the bonds to be refunded thereby are payable or from revenues out of which bonds of the same character may be made payable under this or any other law then in effect at the time of the refunding.
Source:
Section 268.554 — Refunding., https://www.leg.state.nv.us/NRS/NRS-268.html#NRS268Sec554.