Code of Federal Regulations Title 20. Employees' Benefits § 20.404.1585 Trial work period for persons age 55 or older who are blind

(a) You later return to substantial gainful activity that requires skills or abilities comparable to those required in the work you regularly did before you became blind or became 55 years old, whichever is later;  or

(b) Your last previous work ended because of an impairment and the current work requires a significant vocational adjustment.