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§ 2024.030.Expert witnesses; time to complete discovery; motions prior to trial

Title 4. Civil Discovery Act · Chapter 8. Time for Completion of Discovery · Enacted 2004 · no amendments on record · Last verified July 29, 2026

In one sentenceSection 2024.030 sets a separate, later cutoff for discovery aimed at a witness identified as an expert under the expert-exchange procedure: a party may complete that discovery up to 15 days before trial and have related discovery motions heard up to 10 days before trial.

Full Text of § 2024.030

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Any party shall be entitled as a matter of right to complete discovery proceedings pertaining to a witness identified under Chapter 18 (commencing with Section 2034.010) on or before the 15th day, and to have motions concerning that discovery heard on or before the 10th day, before the date initially set for the trial of the action.

Plain-English Summary

Expert witnesses are often not identified until relatively close to trial, since the exchange of expert witness information under the chapter governing that process happens on its own separate timeline. Applying the general 30-day and 15-day cutoffs in Section 2024.020 to expert discovery would leave parties too little runway after an expert is named to depose that expert or otherwise discover the basis for the expert's opinions. This section fixes that mismatch by giving expert-related discovery its own, later window: completion up to 15 days before trial, with any motion concerning that discovery heard up to 10 days before trial.

The cutoff here runs on the same trial-date framework as the general rule, just compressed and shifted later so it lines up with when expert witnesses become known to the parties. It applies specifically to discovery pertaining to a witness identified under the expert-witness-exchange procedure; discovery not tied to an expert designation still falls under the general cutoff in Section 2024.020.

Frequently Asked Questions

Why does expert witness discovery get its own, later cutoff?

Because experts are typically identified through a separate exchange process that happens closer to trial than the general discovery cutoff would otherwise allow for.

How many days before trial must expert-related discovery be completed?

15 days before the date initially set for trial.

How many days before trial must expert discovery motions be heard?

10 days before the date initially set for trial.

Does this section replace the general discovery cutoff in Section 2024.020?

No. It applies specifically to discovery concerning a witness identified under the expert-witness-exchange procedure; other discovery still falls under the general cutoff.

Amendment History

(Added by Stats.2004, c. 182 (A.B.3081), § 23, operative July 1, 2005.)

Source & verification. Section text is reproduced verbatim from the West's Annotated California Codes / Thomson Reuters. Enacted by the California Legislature. Last verified July 29, 2026. · Official source
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