Personality Anchoring Procedures govern the stabilization of a subject's identity following substantial memory reconfiguration or anomalous disruption of the sense of self. The procedure is the counterpart to PR-400-20 (Memory Reconfiguration Procedures): where reconfiguration removes or restructures memory, anchoring re-establishes a stable identity around what remains. A subject is described as "anchored" or "treated per PR-400-21" when this procedure is applied.

This procedure governs the re-establishment and stabilization of personal identity. It is applied after Bureau memory reconfiguration that disturbs identity, and after anomalous effects that disrupt the subject's sense of self. It does not restore a lost identity; it stabilizes the identity present at the time of treatment.

Anchoring is indicated:

• following Class IV or Class V memory reconfiguration under PR-400-20, which restructure memory at a scale that destabilizes identity;
• following anomalous identity-class effects, including ontological drift (REP-600-11, Entry 38) at higher tiers and consciousness-displacement (REP-600-11, Entry 58);
• where a subject, after exposure or reconfiguration, presents with identity instability — inconsistency between behaviour and recorded self, or loss of a stable sense of self.

Anchoring re-establishes a set of stable identity anchors — verified autobiographical fact, established relationships, occupational role, and routine — reintroduced under controlled conditions and confirmed against the subject's pre-disruption baseline where one exists. Treatment is conducted in an environment that minimizes novel anomalous exposure for its duration. For reconstructed identities following Class V reconfiguration, anchors are supplied from the reconstruction profile rather than recovered.

The anchored subject is observed for a defined period. Anchoring failure presents as identity drift, sustained inconsistency between behaviour and the anchored profile, or the subject reading as materially changed to those who knew them before — the last being a recognized indicator that may register without producing a documentable finding, and which is not disregarded on that account. Failure is met with extended anchoring, reassignment to reduce exposure, or escalation. A subject who cannot be stably anchored is not returned to duties where instability would compromise containment.