Cal. CCP § 482.100

(a) The defendant may claim an exemption provided in Section 487.020 for property levied upon pursuant to a writ issued under this title if the right to the exemption is the result of a change in circumstances occurring after (1) the denial of a claim of exemption for the property earlier in the action or (2) the expiration of the time for claiming the exemption earlier in the action.

(b) A claim of exemption under this section shall follow the procedure provided in Article 2 (commencing with Section 703.510) of Chapter 4 of Division 2 of Title 9 except that, subject to subdivision (a), the defendant may claim the exemption at any time. For this purpose, references in Article 2 (commencing with Section 703.510) of Chapter 4 of Division 2 of Title 9 to the “judgment debtor” shall be deemed references to the defendant, and references to the “judgment creditor” shall be deemed references to the plaintiff.

(c) The exemption provided by subdivision (b) of Section 487.020 may be claimed at the defendant’s option either pursuant to subdivision (b) of this section or by following the procedure provided in this subdivision. The claim shall be made by filing with the court and serving on the plaintiff a notice of motion. Service on the plaintiff shall be made not less than three days prior to the date set for the hearing. The hearing shall be held not more than five days after the filing of the notice of motion unless, for good cause shown, the court orders otherwise. The notice of motion shall state the relief requested and shall be accompanied by an affidavit supporting any factual issues raised and points and authorities supporting any legal issues raised. At the hearing on the motion, the defendant has the burden of showing that the property is exempt pursuant to subdivision (b) of Section 487.020. Upon this showing and the showing required by subdivision (a), the court shall order the release of the property.