One-Subject Rule Law and Legal Definition
One subject rule is a principle that a statute should embrace only one topic, which should be stated in its title. Many U.S. states like Texas, Ohio, and Indiana have incorporated this rule in their Constitutions. For example, Ohio Constitution Art. II, § 15 (D) says “No bill shall contain more than one subject, which shall be clearly expressed in its title.”
One subject rule is also known as single subject rule.