When a subpoena duces tecum is served upon a custodian of records or other qualified witness as provided in Article 4 (commencing with Section 1560) of Chapter 2 of Division 11 of the Evidence Code, and his personal attendance is not required by the terms of the subpoena, Section 1989 shall not apply.
Source:
Section 1987.3, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=CCP§ionNum=1987.3..