(a) A person who discusses with an attorney the possibility of forming a client-attorney relationship with respect to a matter is a prospective client.
(b) Even when no client-attorney relationship ensues, an attorney who has had discussions with a prospective client shall not use or reveal information learned in the consultation, except as Rule 19-301.9 (1.9) would permit with respect to information of a former client.
(c) An attorney subject to section (b) of this Rule shall not represent a client with interests materially adverse to those of a prospective client in the same or a substantially related matter if the attorney received information from the prospective client that could be significantly harmful to that person in the matter, except as provided in section (d) of this Rule. If an attorney is disqualified from representation under this section, no attorney in a firm with which that attorney is associated may knowingly undertake or continue representation in such a matter, except as provided in section (d) of this Rule.
(d) Representation is permissible if both the affected client and the prospective client have given informed consent, confirmed in writing, or the disqualified attorney is timely screened from any participation in the matter and is apportioned no part of the fee therefrom.