; and (B) by amending paragraph (3) to read as follows: (3) 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 1836 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, 2021, as prescribed under subparagraphs (B)(i), (B)(ii), (B)(iii), and (D) of paragraph (2), or (ii) on or after January 1, 2021, as prescribed under paragraph (2)(C). . (2) Special enrollment periods for exceptional circumstances (A) Enrollment Section 1837 of the Social Security Act ( 42 U.S.C. 1395p ) is amended by adding at the end the following new subsection: (m) Beginning January 1, 2021, the Secretary may establish special enrollment periods in the case of individuals who meet such exceptional conditions as the Secretary may provide, such as individuals who reside in an area with an emergency or disaster as determined by the Secretary. . (B) Coverage period Section 1838 of the Social Security Act ( 42 U.S.C. 1395q ) is amended by adding at the end the following new subsection: (g) Notwithstanding subsection (a), in the case of an individual who enrolls during a special enrollment period pursuant to section 1837(m), the coverage period shall begin on a date the Secretary provides in a manner consistent (to the extent practicable) with protecting continuity of health benefit coverage. . (C) Conforming amendment Section 1839(b) of the Social Security Act ( 42 U.S.C. 1395r(b) ) is amended, in the first sentence, by striking or (l) and inserting , (l), or (m) . (3) Technical correction Section 1839(b) of the Social Security Act ( 42 U.S.C. 1395r(b) ) is amended by adding at the end the following new sentence: For purposes of determining any increase under this subsection for individuals whose enrollment occurs on or after January 1, 2021, the