(A) Subject to subparagraphs (B), (C), (D) and (E), for purposes of computing the primary insurance amount (after December 1978) of an individual to whom paragraph (1) does not apply (other than an individual described in paragraph (4)(B)), this section as in effect in December 1978 shall remain in effect, except that, effective for January 1979, the dollar amount specified in paragraph (3) of this subsection shall be increased to $11.50.
(B) (i) Subject to clauses (ii), (iii), and (iv), and notwithstanding any other provision of law, the primary insurance amount of any individual described in subparagraph (C) shall be, in lieu of the primary insurance amount as computed pursuant to any of the provisions referred to in subparagraph (D), the primary insurance amount computed under subsection (a) of this section as in effect in December 1978, without regard to subsections (b)(4) and (c) of this section as so in effect. (ii) The computation of a primary insurance amount under this subparagraph shall be subject to section 104(j)(2) of the Social Security Amendments of 1972 (relating to the number of elapsed years under subsection (b)). (iii) In computing a primary insurance amount under this subparagraph, the dollar amount specified in paragraph (3) of subsection (a) (as in effect in December 1978) shall be increased to $11.50. (iv) In the case of an individual to whom subsection (d) applies, the primary insurance amount of such individual shall be the greater of— (I) the primary insurance amount computed under the preceding clauses of this subparagraph, or (II) the primary insurance amount computed under subsection (d).
(C) An individual is described in this subparagraph if— (i) paragraph (1) does not apply to such individual by reason of such individual’s eligibility for an old-age or disability insurance benefit, or the individual’s death, prior to 1979, and (ii) such individual’s primary insurance amount computed under this section as in effect immediately before November 5, 1990 , would have been computed under the provisions described in subparagraph (D).
(D) The provisions described in this subparagraph are— (i) the provisions of this subsection as in effect prior to July 30, 1965 , if such provisions would preclude the use of wages prior to 1951 in the computation of the primary insurance amount, (ii) the provisions of section 409 of this title as in effect prior to August 28, 1950 , and (iii) the provisions of subsection (d) as in effect prior to December 20, 1977 .
(E) For purposes of this paragraph, the table for determining primary insurance amounts and maximum family benefits contained in this section in December 1978 shall be revised as provided by subsection (i) for each year after 1978.