one subject ruleglossary / ONE-SUBJECT RULE one-subject rule. The principle that a statute should embrace only one topic, which should be stated in its title. — Also termed single-subject rule.[Cases: Statutes 107. C.J.S. Statutes § 208.] 词条贡献者 译员Jerry,知名法学院知识产权法,专注翻译各种与版权与商标诉讼有关的法律文件。