Volume III is the closure and safeguarding foundation of the Ethical AI Series — Conservation of Intent trilogy. Building on the doctrinal foundations of Volume I and the ontological foundations of Volume II, it defines the limits required to preserve the trilogy’s lawful meaning under pressure. It formalizes saturation points, overclaim taxonomies, misread safeguards, failure versus refusal distinctions, citation discipline, semantic altitude irreversibility, verification-register limits, canon-usage constraints, and controlled revision boundaries. The purpose of this volume is to protect the trilogy against interpretive laundering, implementation overreach, and unauthorized expansion of claim-scope. It makes explicit how lawful closure operates when readers attempt to convert doctrinal or ontological authority into mechanism, mandate, enforcement, prediction, or inference claims. As the third foundational volume, it completes the trilogy by securing its limits, preserving refusal terminality, and ensuring cross-volume coherence, interpretive discipline, and canon integrity.