§ 171.9 Rules of construction.
发布08-07
生效09-08
摘要总结AI 辅助解读
该条款为美国联邦法规第49篇（交通）危险品运输章节的通用解释规则。主要规定单复数、性别词汇互含，以及“shall/must”（强制）、“should”（建议）、“may”（许可）、“includes”（非穷尽列举）等关键词的法律含义。此为程序性/定义性规范，不直接设定新的实体合规义务或改变操作流程，旨在统一法规文本的理解标准。
- (a) In this subchapter, unless the context requires otherwise:
- (1) Words imparting the singular include the plural;
- (2) Words imparting the plural include the singular; and
- (3) Words imparting the masculine gender include the feminine;
- (b) In this subchapter, the word: (1) “Shall” is used in an imperative sense;
- (2) “Must” is used in an imperative sense;
- (3) “Should” is used in a recommendatory sense;
- (4) “May” is used in a permissive sense to state authority or permission to do the act described, and the words “no person may * * *” or “a person may not * * *” means that no person is required, authorized, or permitted to do the act described; and
- (5) “Includes” is used as a word of inclusion not limitation.
[Amdt. 171-32, 41 FR 15996, Apr. 15, 1976, as amended by Amdt. 171-32A, 41 FR 40630, Sept. 20, 1976; Amdt. 171-121, 58 FR 51528, Oct. 1, 1993; 75 FR 60338, Sept. 30, 2010]