It mandates financial and regulatory controls applied before orders reach a venue: credit and capital thresholds, erroneous order checks, restricted symbol enforcement and duplicate prevention.
The word that does the work is exclusive. Clients may not disable or adjust the limits, and controls may not be outsourced back to the client whose software they exist to contain.
Example: a broker sets a $20 million daily notional cap and a 25,000-share maximum order for a client. The client's algorithm develops a loop and fires 400 orders in a second. The gateway rejects everything past the cap, stopping exposure at $20 million rather than at whatever the loop would have reached.
Related: pre-trade-risk-check, sponsored-access, kill-switch, order-rejection