; 42 U.S.C. 2004a ), to provide safe drinking water and adequate sewer systems in the homes of Indians and Alaska Natives. (b) Waiver of matching funds requirements Notwithstanding any other provision of law, including section 104(k)(10)(B)(iii) of the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 ( 42 U.S.C. 9604(k)(10)(B)(iii) ) and section 793(c)(3) of the Energy Policy Act of 2005 ( 42 U.S.C. 16133(c)(3) ), no matching funds requirement or matching funds incentive shall apply to amounts made available under subsection (a). (c) Emergency designation (1) In general The amounts provided by this section are designated as an emergency requirement pursuant to section 4(g) of the Statutory Pay-As-You-Go Act of 2010 ( 2 U.S.C. 933(g) ). (2) Designation in senate In the Senate, this section is designated as an emergency requirement pursuant to section 4112(a) of H. Con. Res. 71 (115th Congress), the concurrent resolution on the budget for fiscal year 2018. 3. Avoiding cumulative impacts on overburdened communities (a) Definitions Section 501 of the Clean Air Act ( 42 U.S.C. 7661 ) is amended— (1) in the matter preceding paragraph (1), by striking As used in this title— and inserting In this title: ; (2) by redesignating paragraphs (3) and (4) as paragraphs (4) and (5), respectively; and (3) by inserting after paragraph (2) the following: (3) Overburdened census tract The term overburdened census tract means a census tract that— (A) has been identified within the National Air Toxics Assessment published by the Administrator as having a greater than 100 in 1,000,000 total cancer risk; or (B) has been determined to have an annual mean concentration of PM 2.5 of greater than 8 micrograms per cubic meter, as determined over the most recent 3-year period for which data are available. . (b) Permit programs Section 502 of the Clean Air Act ( 42 U.S.C. 7661a ) is amended— (1) in subsection (a), in the first sentence, by striking parts (C) or (D) and inserting part (C) or (D)