If, while the proceeding is pending but before serving as presiding officer, a person receives a communication of a type that would be in violation of this article if received while serving as presiding officer, the person, promptly after starting to serve, shall disclose the content of the communication on the record and give all parties an opportunity to address it in the manner provided in Section 11430.50.
Source:
Section 11430.40, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=GOV§ionNum=11430.40..