; and (II) the ability to discount the emissions of foreign sources in calculating the emissions levels and attainment of an area. (B) Rulemaking required Not later than 3 years after the date of enactment of this paragraph, the Administrator, in consultation with the States, shall complete a rulemaking that details any additional flexibility that is to be provided to Governors of States in the creation of State implementation plans under this section with respect to the facilitation of the ability described in subparagraph (A)(iv)(II). . 3. Review and revision criteria for applicable standards Section 109(d) of the Clean Air Act ( 42 U.S.C. 7409(d) ) is amended by adding at the end the following: (3) (A) Notwithstanding paragraph (1), the Administrator may not issue new standards relating to a criteria pollutant if more than 15 percent of total air quality control regions that were in nonattainment for that criteria pollutant as a result of a previous revision of standards still remain in nonattainment. (B) If fewer than 15 percent of the total number of air quality control regions initially in nonattainment for a criteria pollutant remain in nonattainment for that criteria pollutant, the Administrator may issue new standards relating to that criteria pollutant. . 4. Reclassification of major sources as area sources Section 112 of the Clean Air Act ( 42 U.S.C. 7412 ) is amended by adding at the end the following: (t) Reclassification of major sources as area sources (1) In general At any time that a stationary source demonstrates to the Administrator that the actual or potential emissions of hazardous air pollutants of a major source fall below the standards described in subsection (a)(1) for a period of 6 consecutive months, the Administrator shall reclassify the major source as an area source under this section. (2) Requirements Beginning on the date of a reclassification of a major source as an area source under paragraph (1)— (A) any requirements previously applicable to the reclassified source under a major