Cal. Evid. Code § 782.1

(a) A written motion shall be made by the prosecutor to the court and to the defendant stating that the prosecution has an offer of proof of the relevancy of the possession by the defendant of one or more condoms.

(b) The written motion shall be accompanied by an affidavit in which the offer of proof shall be stated. The affidavit shall be filed under seal and only unsealed by the court to determine if the offer of proof is sufficient to order a hearing pursuant to subdivision (c). After that determination, the affidavit shall be resealed by the court.

(c) If the court finds that the offer of proof is sufficient, the court shall order a hearing out of the presence of the jury, if any, and at the hearing allow questioning regarding the offer of proof made by the prosecution.

(d) At the conclusion of the hearing, if the court finds that evidence proposed to be offered by the prosecutor regarding the possession of condoms is relevant pursuant to Section 210, and is not inadmissible pursuant to Section 352, the court may make an order stating what evidence may be introduced by the prosecutor. The prosecutor may then offer evidence pursuant to the order of the court.

(e) An affidavit resealed by the court pursuant to subdivision (b) shall remain sealed, unless the defendant raises an issue on appeal or collateral review relating to the offer of proof contained in the sealed document. If the defendant raises that issue on appeal, the court shall allow the Attorney General and appellate counsel for the defendant access to the sealed affidavit. If the issue is raised on collateral review, the court shall allow the district attorney and defendant’s counsel access to the sealed affidavit. The use of the information contained in the affidavit shall be limited solely to the pending proceeding.