1. Short title This Act may be cited as the Air Designation Actions in Areas of Pollutant Transport Act or the ADAAPT Act . 2. Amendments to the Clean Air Act (a) International border areas Section 179B of the Clean Air Act ( 42 U.S.C. 7509a ) is amended— (1) in subsection (a)(1)— (A) by striking the Act and inserting this Act ; and (B) by striking , and and inserting ; and ; (2) in subsection (b), by striking section 181(a)(2) or (5) and inserting section 181(b)(2) ; (3) in subsection (c), by striking or (9) ; and (4) by adding at the end the following: (e) Action on demonstration Not later than 180 days after the date on which the Administrator receives a demonstration of attainment submitted by a State under subsection (b), (c), or (d), the Administrator shall approve or disapprove the demonstration. . (b) Marginal areas Section 182(a)(2) of the Clean Air Act ( 42 U.S.C. 7511a(a)(2) ) is amended— (1) in the matter preceding subparagraph (A), by striking requirements— and inserting requirements: ; and (2) in subparagraph (C)— (A) by redesignating clauses (i) and (ii) as subclauses (I) and (II), respectively, and indenting appropriately; (B) in the matter preceding subclause (I) (as so designated), by striking Within and inserting the following: (i) Revision Subject to clause (ii), not later than ; and (C) by adding at the end the following: (ii) Certain nonattainment areas (I) Applicability Section 173(a)(1) shall not apply to a revision submitted to the Administrator under clause (i) for a nonattainment area described in subclause (III). (II) Best available control technology With respect to a revision submitted to the Administrator under clause (i) for a nonattainment area described in subclause (III), a State may substitute the best available control technology (as defined in section 169) for the lowest achievable emission rate. (III) Nonattainment areas A nonattainment area described in this subclause is a nonattainment area— (aa) with an implementation plan or plan revision approved under section 179B(a)