Cal. Sts. & Hy. Code § 10353
Before ordering any changes made, other than as provided in Section 10352, the legislative body shall adopt a resolution briefly describing the changes proposed to be made, stating the amount of the estimated increase or decrease in the cost of the improvement by reason of the proposed changes and giving notice of a time and place when and where any interested person having any objection to the changes proposed to be made may appear before the legislative body and show cause why the changes should not be ordered. The resolution shall also contain the name and telephone number of a local department or agency designated by the legislative body to answer inquiries regarding the hearing proceedings. The resolution may describe the changes by referring to maps, plats, plans, profiles, detailed drawings, or specifications on file in the office of the clerk of the legislative body or engineer, which shall indicate the changes proposed to be made and which shall govern for all details thereof. The resolution shall be published pursuant to Section 6061 of the Government Code, at least 10 days prior to the date of the hearing. If new, increased, or extended assessments are proposed, the legislative body shall comply with the notice, protest, and hearing procedures in Section 53753 of the Government Code.
Ca. Sts. and High. Code § 10353