The arbitral award shall state the reasons upon which it is based, unless the parties have agreed that no reasons are to be given, or the award is an arbitral award on agreed terms under Article 3 (commencing with Section 1297.301) of this chapter.
Source:
Section 1297.313, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=CCP§ionNum=1297.313..