In addition to the circumstances referred to under Article 4 (commencing with Section 1297.131) and Article 5 (commencing with Section 1297.141) of this chapter, the mandate of an arbitrator terminates upon his or her withdrawal from office for any reason, or by or pursuant to agreement of the parties.
Source:
Section 1297.151, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=CCP§ionNum=1297.151..