Cross-Domain Invariance (ICF-4) provides a synthesis layer for the ImpersonalClosure Framework. It proposes that, across domains under high scrutiny, systemsconverge on a small set of stable operations that regulate knowability and exposure.The paper introduces the closure stack: a coupled structure in which (i) DescriptiveClosure (ICF-0) limits further explicitness, (ii) Decision Displacement (ICF-1) convertsdecisive ownership into procedure and reversible steps, and (iii) Audit Substitution(ICF-2) replaces understanding with auditable artifacts. The stack is not presented aspathology or conspiracy; it is presented as a survivability response to asymmetricpenalties under review. ICF-4 defines cross-domain invariance claims, specifiesobservable translation traces, and provides minimal validity conditions to keep theanalysis structural and non-prescriptive. The document does not name institutions,does not recommend interventions, and does not describe tactics for evasion ormanipulation. Its purpose is cumulative: to enable citation and comparison of howsystems co-produce ‘what is real’ as ‘what is defensible’ when full legibility isunaffordable.