A party served with a cross-complaint may within 30 days after service move, demur, or otherwise plead to the cross-complaint in the same manner as to an original complaint.
Objections to Pleadings; Denials and DefensesTime to Respond to Cross-complaint
Section § 432.10
If someone is served with a cross-complaint, they have 30 days to respond to it in the same way they would respond to an original complaint. This can include filing a motion, demurrer (a type of objection), or other legal pleadings.
cross-complaint response 30-day response period motion to cross-complaint