# 49 CFR § 193.2009: Rules of regulatory construction

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/ecfr-49-193.2009

## Section

- **Citation:** 49 CFR § 193.2009
- **Heading:** Rules of regulatory construction
- **Jurisdiction:** Federal
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** September 22, 2026
- **Source:** Publisher's official text
- **Location:** Title 49—Transportation > Subtitle B—Other Regulations Relating to Transportation > CHAPTER I—PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION > SUBCHAPTER D—PIPELINE SAFETY > PART 193—LIQUEFIED NATURAL GAS FACILITIES: FEDERAL SAFETY STANDARDS > Subpart A—General

## Text

(a) As used in this part:
(1) Includes means including but not limited to;
(2) May means is permitted to or is authorized to;
(3) May not means is not permitted to or is not authorized to; and
(4) Shall or must is used in the mandatory and imperative sense.
(b) In this part:
(1) Words importing the singular include the plural; and
(2) Words importing the plural include the singular.

## Nearby sections

- [49 CFR § 193.2001 § 193.2001 Scope of part.](https://www.frixlaw.com/law-library/statutes/ecfr-49-193.2001.md)
- [49 CFR § 193.2005 § 193.2005 Applicability.](https://www.frixlaw.com/law-library/statutes/ecfr-49-193.2005.md)
- [49 CFR § 193.2007 § 193.2007 Definitions.](https://www.frixlaw.com/law-library/statutes/ecfr-49-193.2007.md)
- [49 CFR § 193.2009 § 193.2009 Rules of regulatory construction.](https://www.frixlaw.com/law-library/statutes/ecfr-49-193.2009.md)
- [49 CFR § 193.2011 § 193.2011 Reporting.](https://www.frixlaw.com/law-library/statutes/ecfr-49-193.2011.md)
- [49 CFR § 193.2013 § 193.2013 What documents are incorporated by reference partly or wholly in this part?](https://www.frixlaw.com/law-library/statutes/ecfr-49-193.2013.md)
- [49 CFR § 193.2017 § 193.2017 Plans and procedures.](https://www.frixlaw.com/law-library/statutes/ecfr-49-193.2017.md)
- [49 CFR § 193.2019 § 193.2019 Mobile and temporary LNG facilities.](https://www.frixlaw.com/law-library/statutes/ecfr-49-193.2019.md)
- [49 CFR § 193.2051 § 193.2051 Scope.](https://www.frixlaw.com/law-library/statutes/ecfr-49-193.2051.md)
- [49 CFR § 193.2057 § 193.2057 Thermal radiation protection.](https://www.frixlaw.com/law-library/statutes/ecfr-49-193.2057.md)
- [49 CFR § 193.2059 § 193.2059 Flammable vapor-gas dispersion protection.](https://www.frixlaw.com/law-library/statutes/ecfr-49-193.2059.md)
- [49 CFR § 193.2067 § 193.2067 Wind forces.](https://www.frixlaw.com/law-library/statutes/ecfr-49-193.2067.md)
- [49 CFR § 193.2101 § 193.2101 Scope.](https://www.frixlaw.com/law-library/statutes/ecfr-49-193.2101.md)
- [49 CFR § 193.2301 § 193.2301 Scope.](https://www.frixlaw.com/law-library/statutes/ecfr-49-193.2301.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/ecfr-49-193.2009. Check the current official text before relying on it. Not legal advice.