California Code, Government Code - GOV § 50069.5

(a) Chapter 9 (commencing with Section 860) of Title 10 of Part 2 of the Code of Civil Procedure applies to any judicial action or proceeding to validate, attack, review, set aside, void, or annul an ordinance or resolution levying an assessment or modifying or amending an existing ordinance or resolution.

(b) If an ordinance or resolution provides for an automatic adjustment in an assessment, and the automatic adjustment results in an increase in the amount of an assessment, any action or proceeding to attack, review, set aside, void, or annul the increase shall be commenced within 90 days of the effective date of the increase.

(c) Any appeal from a final judgment in the action or proceeding brought pursuant to this section shall be filed within 30 days after entry of the judgment.