49 CFR § 192.15 - Rules of regulatory construction.

---
identifier: "/us/cfr/t49/s192.15"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "49 CFR § 192.15 - Rules of regulatory construction."
title_number: 49
title_name: "Transportation"
section_number: "192.15"
section_name: "Rules of regulatory construction."
chapter_name: "PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "D"
subchapter_name: "PIPELINE SAFETY"
part_number: "192"
part_name: "TRANSPORTATION OF NATURAL AND OTHER GAS BY PIPELINE: MINIMUM FEDERAL SAFETY STANDARDS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "30 U.S.C. 185(w)(3), 49 U.S.C. 5103, 60101  and 49 CFR 1.97."
regulatory_source: "35 FR 13257, Aug. 19, 1970, unless otherwise noted."
cfr_part: "192"
---


# 192.15 Rules of regulatory construction.

(a) As used in this part:

*Includes* means including but not limited to.

*May* means “is permitted to” or “is authorized to”.

*May not* means “is not permitted to” or “is not authorized to”.

*Shall* is used in the mandatory and imperative sense.

(b) In this part:

(1) Words importing the singular include the plural;

(2) Words importing the plural include the singular; and

(3) Words importing the masculine gender include the feminine.