40 CFR · Protection of Environment
§ 86.1837-01 — Rounding of emission measurements.
40 CFR § 86.1837-01
TitleTitle 40: Protection of EnvironmentPartPart 86: Control of Emissions from New and In-Use Highway Vehicles and Engines
SourceeCFR (current through Apr 9, 2026)
This text of 40 C.F.R. § 86.1837-01 (Rounding of emission measurements.) is published on Counsel Stack Legal Research, covering United States primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.
Bluebook
40 C.F.R. § 86.1837-01 (2026).
Text
§ 86.1837-01 Rounding of emission measurements.
(a)Unless otherwise specified, the results of all emission tests shall be rounded to the number of places to the right of the decimal point indicated by expressing the applicable emission standard of this subpart to one additional significant figure, in accordance with 40 CFR 1065.20.
(b)Fleet average NOX value calculations, where applicable, must be rounded before comparing with the applicable fleet average standard and calculating credits generated or needed as follows: manufacturers must round to the same number of significant figures that are contained in the quantity of vehicles in the denominator of the equation used to compute the fleet average NOX emissions, but to no less than one more decimal place than that of the applicable fle
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Related
§ 1065.20
40 C.F.R. § 1065.20
Nearby Sections
11
§ 86.1833-01
Adjustable parameters.§ 86.1834-01
Allowable maintenance.§ 86.1835-01
Confirmatory certification testing.§ 86.1837-01
Rounding of emission measurements.§ 86.1840-01
Special test procedures.Cite This Page — Counsel Stack
Bluebook (online)
40 C.F.R. § 86.1837-01, Counsel Stack Legal Research, https://law.counselstack.com/cfr/40/86/86.1837-01.