Paragraph (1) (except for subparagraph (C)(i) thereof) does not apply to the computation or recomputation of a primary insurance amount for—

(A) an individual who was eligible for a disability insurance benefit for a month prior to January 1979 unless, prior to the month in which occurs the event described in clause (i), (ii), or (iii) of paragraph (3)(A), there occurs a period of at least 12 consecutive months for which he was not entitled to a disability insurance benefit, or

(B) an individual who had wages or self-employment income credited for one or more years prior to 1979, and who was not eligible for an old-age or disability insurance benefit, and did not die, prior to January 1979, if in the year for which the computation or recomputation would be made the individual’s primary insurance amount would be greater if computed or recomputed— (i) under this subsection as in effect in December 1978, for purposes of old-age insurance benefits in the case of an individual who becomes eligible for such benefits prior to 1984, or (ii) as provided by subsection (d), in the case of an individual to whom such section applies.

In determining whether an individual’s primary insurance amount would be greater if computed or recomputed as provided in subparagraph (B), (I) the table of benefits in effect in December 1978, as modified by paragraph (6), shall be applied without regard to any increases in that table which may become effective (in accordance with subsection (i)(4)) for years after 1978 (subject to clause (iii) of subsection (i)(2)(A)) and (II) such individual’s average monthly wage shall be computed as provided by subsection (b)(4).