in the case of an individual who is deemed to have enrolled—
(A)#
on or before the last day of the third month of his initial enrollment period, the first day of the month in which he first meets the applicable requirements of section 1395 o (a) of this title or July 1, 1973 , whichever is later, or
(B)#
on or after the first day of the fourth month of his initial enrollment period, and where such month begins—
(i) before January 1, 2023 , as prescribed under subparagraphs (B)(i), (B)(ii), (B)(iii), and (D)(i) of paragraph (2), or
(ii) on or after January 1, 2023 , as prescribed under subparagraphs (C) and (D)(ii) of paragraph (2).
(B)(i)#
before January 1, 2023 , as prescribed under subparagraphs (B)(i), (B)(ii), (B)(iii), and (D)(i) of paragraph (2), or
(B)(ii)#
on or after January 1, 2023 , as prescribed under subparagraphs (C) and (D)(ii) of paragraph (2).