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Assurance that operates by making certain failures structurally impossible or highly improbable through design. Preventive assurance dampens assurance load growth by narrowing the action space through enforceable constraints, reducing the set of actions that require retrospective monitoring.
Embedding role-bound authorities within a system so that certain actions are structurally impossible for unauthorised actors—regardless of intent, policy awareness, or oversight coverage.
Section IV: Constraint Placement and the Dynamics of Assurance Load