A signed record generated by the same infrastructure it documents remains internal evidence, however strong its cryptography. SOURCE 0 identifies what a genuine witness requires that no signature alone can supply.

Governance only becomes enforceable when three conditions are simultaneously met: T‑0 fixation, structural independence (S ∩ C = ∅), and legal opposability. Without these properties, no post-execution record can establish a governance state that was never sealed. This article articulates the architectural conditions under which governance ceases to be a management assertion and becomes a verifiable system property.