§ 1042.501 How do I run a valid emission test?
§ 1042.505 Testing engines using discrete-mode or ramped-modal duty cycles
§ 1042.515 Test procedures related to not-to-exceed standards
§ 1042.520 What testing must I perform to establish deterioration factors?
§ 1042.525 How do I adjust emission levels to account for infrequently regenerating aftertreatment devices?