This paper establishes the architectural foundation of the admissibility constraint map. It identifies the minimal structural elements required for admissibility to be enforced without introducing new primitives, dynamics, or construction procedures. The map is not a model or an implementation; it is a boundary description of how admissible structures must be organized to preserve standing. The analysis demonstrates that admissibility cannot be imposed globally, hierarchically, or incrementally. Instead, it requires a specific architectural arrangement in which constraints, definitions, and representations are locally bound and fail-closed. Attempts to reorganize this architecture—by flattening, globalizing, or parameterizing it—are shown to collapse into hidden scope transport or standing failure. The result fixes the admissibility constraint map as a necessary structural architecture rather than a design choice. No diagrams, pipelines, or operational layouts are provided. The paper records the architectural conditions under which admissibility can exist at all, without offering any recipe for construction or implementation.