Colo. R. Civ. P. 242.20
As provided in C.R.C.P. 227(A)(8), the supreme court may permit a lawyer to resign from the practice of law in Colorado. The Regulation Counsel must inform the supreme court whether any disciplinary or disability matter involving the lawyer should preclude the lawyer's resignation and whether any pre-complaint proceeding pending against the lawyer under this rule should be dismissed. A lawyer may not resign if a complaint under C.R.C.P. 242.25 is pending against the lawyer. A lawyer who has been permitted to resign remains subject to the supreme court's jurisdiction as set forth in C.R.C.P. 242.1 as to the lawyer's previous or authorized practice of law in Colorado. Resignation under C.R.C.P. 227(A)(8) is not a form of discipline.
C.R.C.P. 242.20