Regulationcurrent
49 CFR 192.15
Rules of regulatory construction.
Current as of 2026-08-18 Government source
eCFR editorial compilationAuthoritative but unofficial
View source (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.#