(a) An attorney shall not reveal information relating to representation of a client unless the client gives informed consent, the disclosure is impliedly authorized in order to carry out the representation, or the disclosure is permitted by section (b) of this Rule.

(b) An attorney may reveal information relating to the representation of a client to the extent the attorney reasonably believes necessary:

(1) to prevent reasonably certain death or substantial bodily harm;

(2) to prevent the client from committing a crime or fraud that is reasonably certain to result in substantial injury to the financial interests or property of another and in furtherance of which the client has used or is using the attorney's services;

(3) to prevent, mitigate, or rectify substantial injury to the financial interests or property of another that is reasonably certain to result or has resulted from the client's commission of a crime or fraud in furtherance of which the client has used the attorney's services;

(4) to secure legal advice about the attorney's compliance with these Rules, a court order or other law;

(5) to establish a claim or defense on behalf of the attorney in a controversy between the attorney and the client, to establish a defense to a criminal charge, civil claim, or disciplinary complaint against the attorney based upon conduct in which the client was involved or to respond to allegations in any proceeding concerning the attorney's representation of the client; or

(6) to comply with these Rules, a court order or other law.