(a) While lawyers are associated in a firm, none of them shall knowingly represent a client when any one of them practicing alone would be prohibited from doing so by Rules 1.7 or 1.9, unless the prohibition is based on a personal interest of the prohibited lawyer and does not present a significant risk of materially limiting the representation of the client by the remaining lawyers in the firm.

(b) When a lawyer has terminated an association with a firm, the firm is not prohibited from thereafter representing a person with interests materially adverse to those of a client represented by the formerly associated lawyer and not currently represented by the firm, unless:

       (1) the matter is the same or substantially related to that in which the formerly associated lawyer represented the client; and

       (2) any lawyer remaining in the firm has information protected by Rules 1.6 and 1.9(c) that is material to the matter.

(c) A disqualification prescribed by this rule may be waived by the affected client under the conditions stated in Rule 1.7.