20 C.F.R. § 416.935 : Employees' Benefits — SOCIAL SECURITY ADMINISTRATION — SUPPLEMENTAL SECURITY INCOME FOR THE AGED, BLIND, AND DISABLED — DETERMINING DISABILITY AND BLINDNESS —DRUG ADDICTION AND ALCOHOLISM — How we will determine whether your drug addiction or alcoholism is a contributing factor material to the determination of disability

(a) General. If we find that you are disabled and have medical evidence of your drug addiction or alcoholism, we must determine whether your drug addiction or alcoholism is a contributing factor material to the determination of disability, unless we find that you are eligible for benefits because of your age or blindness.
(b) Process we will follow when we have medical evidence of your drug addiction or alcoholism.
(1) The key factor we will examine in determining whether drug addiction or alcoholism is a contributing factor material to the determination of disability is whether we would still find you disabled if you stopped using drugs or alcohol.
(2) In making this determination, we will evaluate which of your current physical and mental limitations, upon which we based our current disability determination, would remain if you stopped using drugs or alcohol and then determine whether any or all of your remaining limitations would be disabling.
(i) If we determine that your remaining limitations would not be disabling, we will find that your drug addiction or alcoholism is a contributing factor material to the determination of disability.
(ii) If we determine that your remaining limitations are disabling, you are disabled independent of your drug addiction or alcoholism and we will find that your drug addiction or alcoholism is not a contributing factor material to the determination of disability.

20 C.F.R. §416.935

60 FR 8151, 2/10/1995