A blind DIB, CDB, or DWB claimant, age 55 or older, may be found disabled if they
            are unable to engage in SGA requiring skills or abilities comparable to those of any
            gainful activity in which they were previously engaged with some regularity and over
            a substantial period of time prior to onset of blindness or the attainment of age
            55, whichever is later. If such an individual does engage in noncomparable SGA, they
            may be entitled to disability benefit status (SSA-831-U3, item 18B), but cash benefit
            payments will be suspended as long as the individual is actually engaging in any SGA.