Section 1565 Of Article 4. Production Of Business Records From California Evidence Code >> Division 11. >> Chapter 2. >> Article 4.

. If more than one subpoena duces tecum is served upon the custodian of records or other qualified witness and the personal attendance of the custodian or other qualified witness is required pursuant to Section 1564, the witness shall be deemed to be the witness of the party serving the first such subpoena duces tecum.