40 CFR 91.510 - Compliance with criteria for production line testing.
§ 91.510 Compliance with criteria for production line testing.
(b) An engine family may be determined to be in noncompliance, if at any time throughout the model year, the CumSum statistic, Ci, for HC NOX. is greater than the action limit, H, for two consecutive tests.
The section you are viewing is cited by the following CFR sections.