Okla. Stat. tit. 5A , app 1-A § 12.1
Upon the death, incapacity (as defined in Rule 10.1) or apparent disappearance of a lawyer, any lawyer or law firm with which the lawyer was professionally associated, including officing arrangements, or any lawyer consulted in connection with a deceased lawyer's estate or a lawyer's disappearance, shall give notice thereof to the General Counsel. Any other lawyer (including, but not limited to, lawyers involved in litigation or transactional activities with the deceased, incapacitated or disappeared lawyer) who becomes aware of a lawyer's death, incapacity or disappearance and who believes that such notice has not been given should do so. If a lawyer's personal incapacity to practice law is in dispute, Rule 6.2A shall be applicable in lieu of this Rule.
Okla. Stat. tit. 5A , app 1-A § 12.1