Substantive

Substantive refers to something that has real, significant, or important content or meaning. It is often used in contrast to "formal" or "procedural," which refer to rules, processes, or structures rather than the actual content or substance of something. In legal contexts, substantive law deals with the rights and obligations of individuals and organizations, whereas procedural law governs the processes by which legal disputes are resolved. The term is also used in various other fields to describe the core or essential elements of a subject, such as in substantive rights, substantive due process, or substantive equality. Substantive can also refer to the essential or inherent nature of something, as in "substantive change" or "substantive reform." In a more general sense, something that is substantive is significant, meaningful, or substantial in its impact or effect.