Part 10. Objections And Limitations of California Streets And Highways Code >> Division 4. >> Part 10.

All objections to the form, contents, validity or sufficiency of the report on the project and all objections to the form, contents, validity or sufficiency of the notice of hearing on the report shall be made in writing and filed with the clerk of the legislative body at or before the time fixed for the hearing on the report, and if not so made at such time shall be waived and no objection thereto may be made thereafter except in case of actual fraud. Any such objections shall be heard and considered and at such hearing the report may be amended in accordance with the facts, and the hearing had upon such report as so amended.

All objections or protests relating to the validity of the proceedings had under this division, and not otherwise provided for in this division, shall be made in writing and filed in the manner and not later than the time at which protests or objections may be filed for the hearing designated in the resolution or ordinance of intention, and any protest or objection relating to the validity of the proceedings had under this division not made at such time and in such manner shall be waived and may not thereafter be urged, pleaded or raised in any action or proceeding, and the adoption of a resolution or ordinance finally ordering the acquisition or improvement shall be conclusive evidence that the proceedings prior thereto under this division are valid and sufficient.

Any action, suit, or proceeding of any kind or nature in which the validity of any of the proceedings taken under this division is questioned or attacked, and any defense in the action, suit, or proceeding, shall be filed within 30 days after the date of the adoption of the resolution or ordinance finally acting on the investigation report or after the date of final action taken pursuant to Section 2804 or 2808 or Part 7 (commencing with Section 2950). If the action is not brought or a defense is not filed within those 30 days, then thereafter all persons shall be barred in any action, suit, or proceeding from pleading, asserting, or claiming that any of the proceedings up to and including the action on the investigation report, or other action specified in this section, were defective, faulty, or invalid in any respect.