; (B) for which the average life expectancy for all individuals diagnosed with such condition or disease does not exceed 5 years from the date of diagnosis; and (C) for which there is no known cure. (3) Reduction in benefit amount If an individual described in paragraph (1) elects to receive a disability insurance benefit beginning with the first month during all of which the individual is under a disability and in which the individual becomes entitled to such benefit, the amount of such benefit for any month shall be equal to 93 percent of the amount otherwise determined for the individual under subsection (a)(2) (after the application of sections 202(q) and 215(b)(2)(A)(ii)). (4) Timing and effect of election An individual may only make an election under this subsection at the time the individual files an application for a disability insurance benefit under subsection (b), and any election under this subsection shall be irrevocable. . (b) Conforming amendments Section 223(a)(2) of the Social Security Act ( 42 U.S.C. 423(a)(2) ) is amended— (1) by striking section 202(q) and and inserting subsection (k)(3), section 202(q), and