California Code, Streets and Highways Code - SHC § 9503

The legislative body of any city in this state may issue refunding bonds and refund outstanding bonds issued either under the Improvement Bond Act of 1915 (Division 10 (commencing with Section 8500)) or under this division, under and subject to this division, and may provide for the extension of the liens of assessments and the levy and collection of assessments and reassessments to pay the refunding bonds.All or any portion of any bond issue authorized for refunding by this section may be refunded pursuant to this section.