CFR > Title 40 > Chapter I > Subchapter U > Part 1045 > Subpart E CFR > Title 40 > Chapter I > Subchapter U > Part 1045 > Subpart E – In-Use Testing Current as of: 2024 | Check for updates | Other versions § 1045.401 What testing requirements apply to my engines that have gone into service? § 1045.405 How does this program work? § 1045.410 How must I select, prepare, and test my in-use engines? § 1045.415 What happens if in-use engines do not meet requirements? § 1045.420 What in-use testing information must I report to EPA? § 1045.425 What records must I keep?