GOV §11430.30: A communication otherwise prohibited by Section 11430.

A communication otherwise prohibited by Section 11430.10 from an employee or representative of an agency that is a party to the presiding officer is permissible in any of the following circumstances: (a) The communication is for the purpose of assistance and advice to the presiding officer from a person who has not served as investigator, prosecutor, or advocate in the proceeding or its preadjudicative stage. An assistant or advisor may evaluate the evidence in the record but shall not furnish, augment, diminish, or modify the evidence in the record. (b) The communication is for the purpose of advising the presiding officer concerning a settlement proposal advocated by the advisor. (c) The communication is for the purpose of advising the presiding officer concerning any of the following matters in an adjudicative proceeding that is nonprosecutorial in character: (1) The advice involves a technical issue in the proceeding and the advice is necessary for, and is not otherwise reasonably available to, the presiding officer, provided the content of the advice is disclosed on the record and all parties are given an opportunity to address it in the manner provided in Section 11430.50. (2) The advice involves an issue in a proceeding of the San Francisco Bay Conservation and Development Commission, California Tahoe Regional Planning Agency, Delta Protection Commission, Water Resources Control Board, or a regional water quality control board.