; and (II) condition any approval issued by the Secretary in the environmental review process on satisfying conformity requirements prior to construction. . (c) Technical correction to margins The margins of paragraphs (5) through (10) of section 176(c) of the Clean Air Act ( 42 U.S.C. 7506(c) ) are amended by moving such margins 2 ems to the left. (d) Applicability Section 176(c)(5) of the Clean Air Act ( 42 U.S.C. 7506(c)(5) ), as amended by subsection (c), is further amended— (1) by striking (5) Applicability .—This subsection and inserting (5) Applicability .—(A) This subsection ; and (2) by adding at the end the following new subparagraph: (B) If a new national ambient air quality standard is promulgated for an air pollutant under section 109, the requirements of this section apply only with respect to the most recently promulgated standard. . (e) Programmatic conformity determinations Section 176(c) of the Clean Air Act ( 42 U.S.C. 7506(c) ), as amended, is amended by adding at the end the following new paragraph: (11) Programmatic conformity determinations (A) In general The Secretary of Transportation— (i) shall, to the maximum extent practicable, use programmatic conformity determinations to streamline the process for satisfying transportation conformity requirements under this subsection; and (ii) may issue a programmatic conformity determination, in consultation with the Administrator, on a nationwide, statewide, metropolitan, or other geographic basis. (B) Regulations (i) Requirement Not later than 180 days after the date of enactment of this paragraph, the Secretary of Transportation shall issue regulations implementing this paragraph. (ii) Contents The regulations required by clause (i) shall include, at a minimum, procedures for making programmatic conformity determinations for— (I) projects in marginal nonattainment areas; (II) projects that are not exempt from conformity requirements, but would have individually and cumulatively minor effects on the applicable area’s ability to control pollutants