Regulations last checked for updates: Feb 16, 2025

Title 40 - Protection of Environment last revised: Nov 16, 2025
All TitlesTitle 40Chapter IPart 1066Subpart J - Subpart J—Evaporative Emission Test Procedures
View all text of Subpart J [§ 1066.901 - § 1066.985]
§ 1066.955 - Diurnal emission test.

Test vehicles for diurnal emissions as described in 40 CFR 86.133-96.

authority: 42 U.S.C. 7401-7671q.
source: 79 FR 23823, Apr. 28, 2014, unless otherwise noted.
cite as: 40 CFR 1066.955
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