Cal. Civ. Proc. Code § 2020.440

Promptly on or after the deposition date and after the receipt or the making of a copy of business records under this article, the deposition officer shall provide that copy to the party at whose instance the deposition subpoena was served, and a copy of those records to any other party to the action who then or subsequently, within a period of six months following the settlement of the case, notifies the deposition officer that the party desires to purchase a copy of those records.