; or (B) if the Administrator grants an extension under section 188(e) of that Act ( 42 U.S.C. 7513(e) ), as expeditiously as practicable, but not later than December 31, 2028. (3) If the Fairbanks North Star Borough does not attain the national ambient air quality standard by the applicable Serious Area attainment date under paragraph (2), the deadline for the submission of the revision of the Serious Area implementation plan that provides for attainment and for the annual reduction in PM2.5 or PM2.5 precursor emissions of not less than 5 percent under section 189(d) of the Clean Air Act ( 42 U.S.C. 7513a(d) ) shall be— (A) if the Administrator does not grant an extension under section 188(e) of that Act ( 42 U.S.C. 7513(e) ), not later than 1 year after the Serious Area attainment date under paragraph (2)(A); or (B) if the Administrator grants an extension under section 188(e) of that Act ( 42 U.S.C. 7513(e) ), not later than 1 year after the Serious Area attainment date under paragraph (2)(B).