certifies that—
(I)#
the individual has a medically determinable physical or mental impairment, which results in marked and severe functional limitations, and which can be expected to result in death or which has lasted or can be expected to last for a continuous period of not less than 12 months, or is blind (within the meaning of section 1614(a)(2) of the Social Security Act), and
(II)#
such blindness or disability occurred before the date on which the individual attained age 46, and