Excessive DMU Utilization. If the Client’s DMU exceeds the maximum allocation by fifty (50%) at any time, FormRouter may, at it’s discretion, suspend Client’s access to its Individual Accounts until Client upgrades it’s DMU. An Invoice for any necessary DMU upgrades selected by Client will be sent to the Client and payable within fifteen (15) days from its receipt thereof. If said Invoice is not contested and is not paid within such fifteen (15) day period, FormRouter may, at its discretion, suspend the Individual Accounts. FormRouter reserves the right to establish or modify its general practices and limits relating to DMU.