Abstract: We demonstrate a precise conceptual alignment between two independently validated UNNS chambers: the κ₂ conditional selection operator and Chamber XXXV's Ω→τ coupling protocol. κ₂ proves that selection can be structurally dormant when observability collapses; Chamber XXXV proves that stabilization dynamics are only admissible after Ω-selection establishes an observable substrate. Both chambers reject the assumption that "if structure exists, operators should act on it." Instead, they establish a shared principle: higher-order action is conditional on lower-order stability, not on operator capability. This alignment reveals a fundamental architectural constraint in the UNNS substrate where observability gates selection and selection gates transformation.