A hearing on a petition filed by a private, non-profit human service organization shall be held in the San Francisco office of the Office of Administrative Hearings if the transaction occurred or the organization resides within the First Appellate District, be held in the Los Angeles office of the Office of Administrative Hearings if the transaction occurred or the organization resides within the Second or Fourth Appellate District, and be held in the Sacramento office of the Office of Administrative Hearings if the transaction occurred or the organization resides within the Third or Fifth Appellate District. The parties may also, by mutual agreement, select another office of the Office of Administrative Hearings as the hearing site.