Cal. Civ. Proc. Code § 430.90
(a) Where the defendant has removed a civil action to federal court without filing a response in the original court and the case is later remanded for improper removal, the time to respond shall be as follows:
(2) If the defendant has not filed an answer in the original court, then 30 days from the day the original court receives the case on remand to do any of the following: