Code Civ. Proc., § 751.56

(a) An answer to the complaint must be served within 90 days after the first publication of the notice, or such further time not exceeding 30 days, as the court for good cause may grant.

(b) An answer must:

(1) Specifically set out the particulars in which the claimant’s estate, right, title, or interest in or to, or lien upon all or any part of the property is different from, or greater than, the interest of the claimant as it is described in the complaint.

(2) Be confined to rights based on events occurring at the time of, or since the time of the disaster.

(c) To whatever extent, if at all, the answering party has rights against anyone whatsoever, based upon facts or events which occurred before the disaster, the claims shall remain unaffected by the action brought under this chapter and shall be assertable subsequent to the conclusion of the action at any time and in any manner permitted by law, notwithstanding the judgment granted in this action, recognizing however the finality of this judgment as to the consequences, with respect to land boundaries as applicable to land in the disaster area.