Cal. Bus. & Prof. Code § 2316

If a licensed physician and surgeon who provides expertise to the board in the evaluation of an applicant or a licensee is, as a result of providing that expertise, the subject of a disciplinary proceeding undertaken by a specialty board of which the physician and surgeon is a member, with board approval, the Office of the Attorney General shall represent the physician and surgeon in that disciplinary proceeding regarding any allegation brought against the physician and surgeon as a direct result of providing that expertise to the board.