California Code, Government Code - GOV § 54712

Any local agency levying a benefit assessment pursuant to this chapter may bring an action to determine the validity of the assessment pursuant to Chapter 9 (commencing with Section 860) of Title 10 of Part 2 of the Code of Civil Procedure upon adoption of the assessment and for 60 days thereafter.  If the agency does not bring its own action under Chapter 9 (commencing with Section 860) of Title 10 of Part 2 of the Code of Civil Procedure, then Sections 863 and 869 of the Code of Civil Procedure shall not apply.