49 C.F.R. § 193.2009 Rules of regulatory construction.
Title 49 - Transportation
(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.
Title 49: Transportation
PART 193—LIQUEFIED NATURAL GAS FACILITIES: FEDERAL SAFETY STANDARDS
Subpart A—General
§ 193.2009 Rules of regulatory construction.
