1- An order may specify the total share volume and may also specify a lesser amount than is disclosed to the market. However, the disclosed share volume should not exceed the undisclosed volume by 50% of the total share volume.

2- Undisclosed volume amounts are private; they are only seen by the stockbroker entering the order and the Market Controller. Everyone else will only see an indication that an undisclosed volume is present. When fills have reduced an order to the point where there is no remaining undisclosed volume, the indicator will no longer appear.

3- If an order can be filled on initial entry, it will be filled to the extent of the total volume of the order. A partial fill will result in the remaining order volume being posted with the full original disclosed volume, provided sufficient volume remains.

4- The disclosed quantity acts as the roll-in quantity upon the original order entry. Roll-in quantity cannot be changed, except by changing the disclosed quantity. A change in the disclosed volume will not change the total or remaining volume.

5- An increase in the disclosed volume will lead to a new time stamp and change in queue priority. A decrease in the disclosed volume will not lead to a new time stamp.

6- Partial fill diminishes current volume without replenishment from undisclosed volume, unless there are no further orders behind at the current price level. Where no orders exist behind the traded order, the disclosed quantity will be automatically rounded-up to the full disclosed amount. When there are orders queued after the disclosed volume, the total disclosed volume must be traded before a new roll-in quantity is brought in. Once the total disclosed volume is traded, another amount equal to the disclosed volume will be rolled-in with a new effective time stamp.

7- Only the disclosed volume and an indicator showing that there is an undisclosed amount is public.