You can specify cost options and requisition preferences unique to each contract and purchase order. Cost options and requisition preferences at the contract or purchase order level override the settings at the project level.
From the Select an action drop-down list, choose Cost Options to open the Cost Options Dialog Box. Set the cost options and requisition preferences for requisitions generated from this contract or purchase order.
To ensure that invoice cost values do not exceed the revised contract or purchase order value, mark the Do Not Allow Invoices to Exceed Revised Contract/Purchase Order Value checkbox. This will overrule the same setting on the Cost Options setting of the Project Settings dialog box.