CODE OF CIVIL PROCEDURE § 2025.620. Use of deposition as evidence; Requirements, Cal Code Civ Proc § 2025.620
Summary
At the trial or any other hearing in the action, any part or all of a deposition may be used against any party who was present or represented at the taking of the deposition, or who had due notice of the deposition and did not serve a valid objection under Section 2025.410, so far as admissible under the rules of evidence applied as though the deponent were then present and testifying as a witness, in accordance with the following provisions:
(a) Any party may use a deposition for the purpose of contradicting or impeaching the testimony of the deponent as a witness, or for any other purpose permitted by the Evidence Code.
(b) An adverse party may use for any purpose, a deposition of a party to the action, or of anyone who at the time of taking the deposition was an officer, director, managing agent, employee, agent, or designee under Section 2025.230 of a party. It is not ground for objection to the use of a deposition of a party under this subdivision by an adverse party that the deponent...