Governance requires not only the ability to Enforce a Decision, but also the ability to verify afterward what was actually requested, how the Decision was Enforced, and what ultimately occurred. Runtime Enforcement therefore records Execution Events as Execution Evidence.

For example, when an External Transmission is Blocked based on the Decision “DENY external transmission,” the system captures not only the existence of the Decision, but also the actual Request, the Enforcement applied, and the resulting Outcome.

Execution Evidence includes the information necessary to reconstruct Runtime events, such as Decision, Request, Enforcement, Time, System, Outcome, and Integrity. This connects the Decision-State Evidence (DSE) preserved upstream with the actual Execution Outcome observed at Runtime.

DSE alone can establish which Decision was formed at that point in time, but it does not demonstrate whether that Decision was actually Enforced. Conversely, Execution Evidence alone does not provide the Governance grounds explaining why the Operation was Allowed or Blocked. Connecting the two creates an Evidence Chain of Decision → Enforcement → Outcome.

Execution Evidence must be preserved in a Tamper-Evident form that maintains Integrity, allowing subsequent modifications to be detected and verified. The specific storage mechanism depends on the Implementation; this Reference Model conceptually illustrates a Ledger as one possible approach.

The Execution Boundary is therefore not merely a point at which Execution is Allowed or Blocked. It connects Governance Decisions to actual Execution while also serving as the point at which Evidence of how those Decisions were Enforced is returned to the Governance Layer.

This closes the Governance Loop of Decision → Enforcement → Outcome → Evidence.