Optional regulatory metadata — included when the agent operates under a reporting regime that requires structured fields in the audit trace.

All fields are optional. The block itself is absent (None) when no regulatory context is provided by the agent.

MiFID II (EU): algorithmic trading identifier + decision-maker identity. CFTC (US): Commodity Trading Advisor Code + special account code. SEC/FINRA: optional order-tracking reference number (CAT NMS).

IRL seals and persists whatever the agent supplies — it does not validate against any external regulatory schema. Compliance teams are responsible for verifying that the values satisfy their specific reporting obligations.