42 CFR § 436.540
Definition of disability
June 11, 2020
(a) Definition. The agency must use the definition of permanent and total disability that is used in the State plan for APTD or AABD. (See 45 CFR 233.80(a)(1) for the Federal recommended definition of permanent and total disability.)
(b) State plan requirement. The State plan must contain the definition of permanent and total disability.