of enactment of this Act, such special enrollment period shall begin not later than 90 days after such date of enactment. Nothing in this paragraph shall be construed as affecting the authority of the Secretary to establish additional special enrollment periods under such subparagraph (C). 5. Removing citizenship and immigration barriers to access to affordable health care under the ACA (a) In general (1) Premium tax credits Section 36B of the Internal Revenue Code of 1986 is amended— (A) in subsection (c)(1)(B)— (i) by amending the heading to read as follows: Special rule for certain individuals ineligible for medicaid due to status