http://www.iardc.org/rule770inactivestatus.html
INACTIVE STATUS Prior to November 1, 1999,
former Supreme Court Rule 770 provided for a proceeding in the Court for any voluntary transfer to inactive status, whether because of some incapacitating condition or solely as a matter of the lawyer’s preference because the lawyer would not be practicing law.
The current registration rules provide a procedure for lawyers on Court-ordered inactive status under former Supreme Court Rule 770 who might wish to register.
Whatever registration status the lawyer wishes to assume (active, inactive, or retired), the lawyer must first file a motion with the Supreme Court for restoration to active status under Rule 759. The motion process is necessary to screen for those who transferred due to circumstances that require some review of present fitness, and the motions will be contested only in such cases. In all other cases, the ARDC will consent to the transfer, and when a consent is submitted, the Supreme Court typically allows the motion within a few weeks of when it is filed.
The entire article @ link is worth reading.
http://www.dcba.org/brief/marissue/1998/art60398.htm
II. Confidentiality Issues And Attorney Impairment Supreme Court Rule 766 sets forth disciplinary matters that shall remain private and confidential.28 Matters mentioned under this Rule include proceedings before the Inquiry Board. This provision applies to all matters brought before the Inquiry Board, whether they involve attorney impairment or not. Rule 766 also provides that proceedings before the Hearing and Review Boards pursuant to Rule 758 shall remain confidential.