This rule has no DR counterpart; the situations covered by it have instead usually been dealt with through an interpretation of Canon 9 of the Code of Professional Responsibility. The Court adopts the recommendation of the Debevoise Committee but adds a new paragraph (b) stating that the provisions of RPC 1.7(c), added by the Court, are applicable as well to cases covered by RPC 1.9. Paragraph (a) differs from the ABA version in that the client's consent must be "after a full disclosure of the circumstances and consultation with the former client."