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United States vehicle emission standards are set through a combination of legislative mandates enacted by Congress through Clean Air Act (CAA) amendments from 1970 onwards, and executive regulations managed nationally by the Environmental Protection Agency (EPA), and more recently along with the National Highway Traffic Safety Administration (NHTSA).
In 2014, the EPA published its "Tier 3" standards for these vehicles, which tightened air pollution emission requirements and lowered the sulfur content in gasoline. [ 9 ] EPA has separate regulations for small engines, such as groundskeeping equipment .
In November 2018, SEMA threatened to file a lawsuit against the NHTSA if they did not comply with the law and issue the required regulations. [4] In December 2019, the NHTSA released a document outlining the regulations. [5] In January 2021, the NHTSA issued a final ruling to allow low volume vehicle manufacturing. [6]
Section 202(a)(1) of the Clean Air Act requires the Administrator of the EPA to establish standards "applicable to the emission of any air pollutant from…new motor vehicles or new motor vehicle engines, which in [her] judgment cause, or contribute to, air pollution which may reasonably be anticipated to endanger public health or welfare" (emphasis added). [3]
Part 544: [91] Insurer reporting requirements; Part 545: [92] Federal motor vehicle theft prevention standard phase-in and small-volume line reporting requirements; Part 551: [93] Procedural rules; Part 552: [94] Petitions for rulemaking, defect, and noncompliance orders; Part 553: [95] Rulemaking procedures
Title 40 is a part of the United States Code of Federal Regulations.Title 40 arranges mainly environmental regulations that were promulgated by the US Environmental Protection Agency (EPA), based on the provisions of United States laws (statutes of the U.S. Federal Code).
Each of those lawsuits challenged the legality and technological feasibility of certain engine emission control standards in EPA regulations now referred to as NTE requirements. In their challenge, EMA stated that to determine whether an engine meets a primary emission standard, engines are tested and assessed using a standardized 20-minute ...
New Source Performance Standards (NSPS) are pollution control standards issued by the United States Environmental Protection Agency (EPA). The term is used in the Clean Air Act Extension of 1970 (CAA) to refer to air pollution emission standards, and in the Clean Water Act (CWA) referring to standards for water pollution discharges of industrial wastewater to surface waters.