(a) An attorney who knows that another attorney has committed a violation of the Maryland Attorneys' Rules of Professional Conduct that raises a substantial question as to that attorney's honesty, trustworthiness or fitness as an attorney in other respects, shall inform the appropriate professional authority.

(b) An attorney who knows that a judge has committed a violation of applicable rules of judicial conduct that raises a substantial question as to the judge's fitness for office shall inform the appropriate authority.

(c) This Rule does not require disclosure of information otherwise protected by Rule 19-301.6 (1.6) or information gained by an attorney or judge while participating in an attorney or judge assistance or professional guidance program.