• § 51.350 - Applicability.

• § 51.351 - Enhanced I/M performance standard.

• § 51.352 - Basic I/M performance standard.

• § 51.353 - Network type and program evaluation.

• § 51.354 - Adequate tools and resources.

• § 51.355 - Test frequency and convenience.

• § 51.356 - Vehicle coverage.

• § 51.357 - Test procedures and standards.

• § 51.358 - Test equipment.

• § 51.359 - Quality control.

• § 51.360 - Waivers and compliance via diagnostic inspection.

• § 51.361 - Motorist compliance enforcement.

• § 51.362 - Motorist compliance enforcement program oversight.

• § 51.363 - Quality assurance.

• § 51.364 - Enforcement against contractors, stations and inspectors.

• § 51.365 - Data collection.

• § 51.366 - Data analysis and reporting.

• § 51.367 - Inspector training and licensing or certification.

• § 51.368 - Public information and consumer protection.

• § 51.369 - Improving repair effectiveness.

• § 51.370 - Compliance with recall notices.

• § 51.371 - On-road testing.

• § 51.372 - State Implementation Plan submissions.

• § 51.373 - Implementation deadlines.

• Appendix Appendix A - Appendix A to Subpart S of Part 51—Calibrations, Adjustments and Quality Control

• Appendix Appendix B - Appendix B to Subpart S of Part 51—Test Procedures

• Appendix Appendix C - Appendix C to Subpart S of Part 51—Steady-State Short Test Standards

• Appendix Appendix D - Appendix D to Subpart S of Part 51—Steady-State Short Test Equipment

• Appendix Appendix E - Appendix E to Subpart S of Part 51—Transient Test Driving Cycle