(a) Consent Required to Reveal Information. A lawyer shall not reveal information relating to representation of a client except as stated in subdivisions (b), (c), and (d), unless the client gives informed consent.

(b) When Lawyer Must Reveal Information. A lawyer shall reveal such information to the extent the lawyer reasonably believes necessary: (1) to prevent a client from committing a crime; or (2) to prevent a death or substantial bodily harm to another.

(c) When Lawyer May Reveal Information. A lawyer may reveal such information to the extent the lawyer reasonably believes necessary: (1) to serve the client's interest unless it is information the client specifically requires not to be disclosed; (2) to establish a claim or defense on behalf of the lawyer in a controversy between the lawyer and client; (3) to establish a defense to a criminal charge or civil claim against the lawyer based upon conduct in which the client was involved; (4) to respond to allegations in any proceeding concerning the lawyer's representation of the client; or (5) to comply with the Rules of Professional Conduct.

(d) Exhaustion of Appellate Remedies. When required by a tribunal to reveal such information, a lawyer may first exhaust all appellate remedies. (e) Limitation on Amount of Disclosure. When disclosure is mandated or permitted, the lawyer shall disclose no more information than is required to meet the requirements or accomplish the purposes of this rule.