20 CFR §416.1331

1. (a)General. The last month for which we can pay you benefits based on disability or blindness is the second month after the month in which your disability or blindness ends. (See §§ 416.987(e), 416.994(b)(6) and 416.994a(g) for when disability ends, and § 416.986 for when blindness ends.) See § 416.1338 for an exception to this rule if you are participating in an appropriate program of vocational rehabilitation services, employment services, or other support services. You must meet the income, resources, and other eligibility requirements to receive any of the benefits referred to in this paragraph. We will also stop payment of your benefits if you have not cooperated with us in getting information about your disability or blindness.
2. (b)After we make a determination that you are not now disabled or blind. If we determine that you do not meet the disability or blindness requirements of the law, we will send you an advance written notice telling you why we believe you are not disabled or blind and when your benefits should stop. The notice will explain your right to appeal if you disagree with our determination. You may still appeal our determination that you are not now disabled or blind even though your payments are continuing because of your participation in an appropriate program of vocational rehabilitation services, employment services, or other support services. You may also appeal a determination that your completion of, or continuation for a specified period of time in, an appropriate program of vocational rehabilitation services, employment services, or other support services will not increase the likelihood that you will not have to return to the disability or blindness benefit rolls and, therefore, you are not eligible to continue to receive benefits.