If a demand for an exchange of information concerning expert trial witnesses includes a demand for production of reports and writings as described in subdivision (c) of Section 2034.210, all parties shall produce and exchange, at the place and on the date specified in the demand, all discoverable reports and writings, if any, made by any designated expert described in subdivision (b) of Section 2034.210.
Source:
Section 2034.270, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=CCP§ionNum=2034.270..