In cases ordered to arbitration pursuant to Section 1141.11, no discovery other than that permitted by Chapter 18 (commencing with Section 2034.010) of Title 4 of Part 4 is permissible after an arbitration award except by stipulation of the parties or by leave of court upon a showing of good cause.
Source:
Section 1141.24, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=CCP§ionNum=1141.24..