38 C.F.R. § 4.127 Mental retardation and personality disorders.
Title 38 - Pensions, Bonuses, and Veterans' Relief
Mental retardation and personality disorders are not diseases or injuries for compensation purposes, and, except as provided in §3.310(a) of this chapter, disability resulting from them may not be service-connected. However, disability resulting from a mental disorder that is superimposed upon mental retardation or a personality disorder may be service-connected. (Authority: 38 U.S.C. 1155) [61 FR 52700, Oct. 8, 1996]
Title 38: Pensions, Bonuses, and Veterans' Relief
PART 4—SCHEDULE FOR RATING DISABILITIES
Subpart B—Disability Ratings
Mental Disorders
§ 4.127 Mental retardation and personality disorders.

