Except as otherwise provided in this article, the Code of Judicial Ethics adopted by the Supreme Court pursuant to subdivision (m) of Section 18 of Article VI of the California Constitution for the conduct of judges governs the hearing and nonhearing conduct of an administrative law judge or other presiding officer to which this article applies.
Source:
Section 11475.20, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=GOV§ionNum=11475.20..