(a) Except as stated in section (d) of this Rule, an attorney shall not represent anyone in connection with a matter in which the attorney participated personally and substantially as a judge or other adjudicative officer or law clerk to such a person or as an arbitrator, mediator or other third-party neutral, unless all parties to the proceeding give informed consent, confirmed in writing.

(b) An attorney shall not negotiate for employment with any person who is involved as a party or as an attorney for a party in a matter in which the attorney is participating personally and substantially as a judge or other adjudicative officer or as an arbitrator, mediator or other third-party neutral. An attorney serving as a law clerk to a judge or other adjudicative officer may negotiate for employment with a party or attorney involved in a matter in which the clerk is participating personally and substantially, but only after the attorney has notified the judge or other adjudicative officer.

(c) If an attorney is disqualified by section (a) of this Rule, no attorney in a firm with which that attorney is associated may knowingly undertake or continue representation in the matter unless:

(1) the disqualified attorney is timely screened from any participation in the matter and is apportioned no part of the fee therefrom; and

(2) written notice is promptly given to the parties and any appropriate tribunal to enable them to ascertain compliance with this Rule.

(d) An arbitrator selected as a partisan of a party in a multimember arbitration panel is not prohibited from subsequently representing that party.