Sts. & Hy. Code, § 9522

The proceedings for refunding two or more issues of bonds shall follow as nearly as may be the procedure for the refunding of one issue, with the modifications and changes in the resolutions, notices, reassessment list, bonds, auditor’s report, summons, complaints, and all other proceedings as may be necessary or convenient in carrying through the proceedings, and the legislative body conducting the proceedings is hereby granted full jurisdiction, power, and authority to refund two or more issues of bonds issued under the act in one proceeding under this division and with only one issue of refunding bonds secured by all of the reassessments and to perform all acts, take all steps and proceedings, provide all notices, and do all acts and things necessary or convenient for the refunding that are not prohibited by the United States Constitution or the California Constitution.