¶2Petitioners seek to disqualify a State Bar hearing officer. There is ample reason for ordering that he be disqualified. Our view is that (1) he should have recused himself; (2) the referee appointed to hear the matter erred when he ruled that petitioners failed to sustain their burden of proof; and (3) the State -Bar itself should have confessed error prior to oral argument in this court.
¶3The issue is whether, in a disciplinary proceeding, a State Bar hearing officer is subject to disqualification when her or his law partner and the attorneys being investigated are opposing counsel in a lawsuit that is unrelated to the disciplinary proceeding. On June 7, one day before oral argument here, the State Bar addressed a letter to this court as follows: “This will advise you that the State Bar Disciplinary Board, at its regularly-scheduled meeting in Los Angeles on June 6, 1978, adopted the following Rule of Practice which is effective immediately:
“B.4 A Committee or Panel member assigned to a particular matter shall recuse himself or herself if he or she, or a law firm with which he or she is affiliated, is, or represents, a party to pending litigation with the respondent, or the law firm with which respondent is affiliated.”
¶4California Rules of Procedure of the State Bar, rule 7.10, which purports to deal with disqualification generally, is by no means a complete codification of the pre-June 6th rules.
¶5*619We have been informed that the new June 6th rule applies only to trial-type hearings. There is no justification for allowing hearing officers who preside over more informal proceedings (e.g., the preliminary examination in this case) to be governed by standards of impartiality that are less stringent than those governing formal adjudicators.
¶6The matter is returned to the State Bar for appropriate action.
¶7The dictum to the contrary in Schullman v. State Bar (1973) 10 Cal.3d 526, 536 [111 Cal.Rptr. 161, 516 P.2d 865], footnote 4, is disapproved.