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U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 40Chapter IPart 1048Subpart D - Subpart D—Testing Production-line Engines
§ 1048.301 - When must I test my production-line engines?
§ 1048.305 - How must I prepare and test my production-line engines?
§ 1048.310 - How must I select engines for production-line testing?
§ 1048.315 - How do I know when my engine family fails the production-line testing requirements?
§ 1048.320 - What happens if one of my production-line engines fails to meet emission standards?
§ 1048.325 - What happens if an engine family fails the production-line testing requirements?
§ 1048.330 - May I sell engines from an engine family with a suspended certificate of conformity?
§ 1048.335 - How do I ask EPA to reinstate my suspended certificate?
§ 1048.340 - When may EPA revoke my certificate under this subpart and how may I sell these engines again?
§ 1048.345 - What production-line testing records must I send to EPA?
§ 1048.350 - What records must I keep?
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