Code of Federal Regulations · Section
§ 1500.5 — Rules Of Construction
49 C.F.R. § 1500.5
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(a) In this chapter, unless the context requires otherwise:
(1) Words importing the singular include the plural.
(2) Words importing the plural include the singular.
(3) Words importing the masculine sex include the feminine.
(b) In this chapter, the word:
(1) “Must” is used in an imperative sense;
(2) “May” is used in a permissive sense to state authority or permission to do the act prescribed, and the words “no person may * * *” or “a person may not * * *” mean that no person is required, authorized, or permitted to do the act prescribed; and
(3) “Includes” means “includes but is not limited to”.
Authorizing Statute
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Definitions6 U.S.C. § 1151
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Public transportation security training program6 U.S.C. § 1137
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Transportation Security Administration49 U.S.C. § 114
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Railroad security training program6 U.S.C. § 1167
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Over-the-road bus security training program6 U.S.C. § 1184