This paper establishes a new law-level necessity result within the Tier-0 closure framework: global closure conservation is impossible without local violation. At its core, the result addresses a foundational question that precedes dynamics, probability, or physical interpretation: why does any nontrivial lawful structure exist at all, rather than collapsing into perfect stasis or triviality? Within the Tier-0 framework, lawhood is defined by fixed-point stability under boundary restriction, persistence filtering, and closure completion. The Φ-Void Theorem proves that a system attempting to enforce closure everywhere eliminating all intermediate violation, cannot remain admissible. Such attempts necessarily fail through one of three mechanisms: loss of canonical boundary structure, nonpersistent concentration, or incomplete closure. As a consequence, the existence of something rather than nothing is not attributed to chance, initial conditions, or external forcing. Instead, the paper shows that nontrivial existence itself requires local violation: without a violation sector (“Flow”), lawful structure cannot persist. Perfect closure everywhere corresponds to the absence of admissible law. Motion, time, exploration, apparent randomness, and quantum fluctuation are therefore not introduced as primitives. They emerge downstream as different representations of the same structural necessity: closure cannot be globally conserved without local slack. The result is independent of kinetics, stochastic assumptions, or physical ontology. It functions as a law-level admissibility and classification theorem, clarifying why perfectly static or fully closed universes are not lawful except in trivial cases, and why violation is a prerequisite for the existence of any nontrivial structure at all.