California Code, Government Code - GOV § 53552

Whenever the legislative body of a local agency determines that prudent management of the fiscal affairs of the local agency requires that it issue refunding bonds under the provisions of this article, it may do so without submitting the question of the issuance of the refunding bonds to a vote of the qualified electors of the local agency, unless the legislative body determines to submit the question to a vote, in which case the election shall be held in accordance with the principal act pursuant to which the bonds to be refunded were issued.  Refunding bonds shall not be issued if the total net interest cost to maturity on the refunding bonds plus the principal amount of the refunding bonds exceeds the total net interest cost to maturity on the bonds to be refunded plus the principal amount of the bonds to be refunded, provided that this limitation shall not apply to bonds issued to refund indebtedness imposed by subdivision (b) of Section 53550 as a result of the court decision in Aerospace Corporation v. State Board of Equalization, 218 Cal.App.3d 1300.  Subject to this limitation, the principal amount of the refunding bonds may be more than, less than, or the same as the principal amount of the bonds to be refunded.