# 40 CFR § 1066.10: Other procedures

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/ecfr-40-1066.10

## Section

- **Citation:** 40 CFR § 1066.10
- **Heading:** Other procedures
- **Jurisdiction:** Federal
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** September 22, 2026
- **Source:** Publisher's official text
- **Location:** Title 40—Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER U—AIR POLLUTION CONTROLS > PART 1066—VEHICLE-TESTING PROCEDURES > Subpart A—Applicability and General Provisions

## Text

(a) Your testing. The procedures in this part apply for all testing you do to show compliance with emission standards, with certain exceptions noted in this section. In some other sections in this part, we allow you to use other procedures (such as less precise or less accurate procedures) if they do not affect your ability to show that your vehicles comply with the applicable emission standards. This generally requires emission levels to be far enough below the applicable emission standards so that any errors caused by greater imprecision or inaccuracy do not affect your ability to state unconditionally that the engines meet all applicable emission standards.
(b) Our testing. These procedures generally apply for testing that we do to determine if your vehicles comply with applicable emission standards. We may perform other testing as allowed by the Act.
(c) Exceptions. You may use procedures other than those specified in this part as described in 40 CFR 1065.10(c). All the test procedures noted as exceptions to the specified procedures are considered generically as “other procedures.” Note that the terms “special procedures” and “alternate procedures” have specific meanings; “special procedures” are those allowed by 40 CFR 1065.10(c)(2) and “alternate procedures” are those allowed by 40 CFR 1065.10(c)(7). If we require you to request approval to use other procedures under this paragraph (c), you may not use them until we approve your request.
[79 FR 23823, Apr. 28, 2014, 80 FR 9120, Feb. 19, 2015]

## Nearby sections

- [40 CFR § 1066.1 § 1066.1 Applicability.](https://www.frixlaw.com/law-library/statutes/ecfr-40-1066.1.md)
- [40 CFR § 1066.2 § 1066.2 Submitting information to EPA under this part.](https://www.frixlaw.com/law-library/statutes/ecfr-40-1066.2.md)
- [40 CFR § 1066.5 § 1066.5 Overview of this part 1066 and its relationship to the standard-setting part.](https://www.frixlaw.com/law-library/statutes/ecfr-40-1066.5.md)
- [40 CFR § 1066.10 § 1066.10 Other procedures.](https://www.frixlaw.com/law-library/statutes/ecfr-40-1066.10.md)
- [40 CFR § 1066.15 § 1066.15 Overview of test procedures.](https://www.frixlaw.com/law-library/statutes/ecfr-40-1066.15.md)
- [40 CFR § 1066.20 § 1066.20 Units of measure and overview of calculations.](https://www.frixlaw.com/law-library/statutes/ecfr-40-1066.20.md)
- [40 CFR § 1066.25 § 1066.25 Recordkeeping.](https://www.frixlaw.com/law-library/statutes/ecfr-40-1066.25.md)
- [40 CFR § 1066.101 § 1066.101 Overview.](https://www.frixlaw.com/law-library/statutes/ecfr-40-1066.101.md)
- [40 CFR § 1066.105 § 1066.105 Ambient controls and vehicle cooling fans.](https://www.frixlaw.com/law-library/statutes/ecfr-40-1066.105.md)
- [40 CFR § 1066.110 § 1066.110 Equipment specifications for emission sampling systems.](https://www.frixlaw.com/law-library/statutes/ecfr-40-1066.110.md)
- [40 CFR § 1066.120 § 1066.120 Measurement instruments.](https://www.frixlaw.com/law-library/statutes/ecfr-40-1066.120.md)
- [40 CFR § 1066.125 § 1066.125 Data updating, recording, and control.](https://www.frixlaw.com/law-library/statutes/ecfr-40-1066.125.md)
- [40 CFR § 1066.130 § 1066.130 Measurement instrument calibrations and verifications.](https://www.frixlaw.com/law-library/statutes/ecfr-40-1066.130.md)
- [40 CFR § 1066.135 § 1066.135 Linearity verification.](https://www.frixlaw.com/law-library/statutes/ecfr-40-1066.135.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/ecfr-40-1066.10. Check the current official text before relying on it. Not legal advice.