Participation by a customer that materially supplements, complements, or contributes to the presentation of another party, including the commission staff, may be fully eligible for compensation if the participation makes a substantial contribution to a commission order or decision, consistent with Section 1801.3.
Source:
Section 1802.5, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=PUC§ionNum=1802.5..