Rule conditions are tested in the order in which they appear in the Assignment Rules dialog box. Conditions can be reordered so that they are tested in a different order.
Click Tools Administration Vault Settings.
In the Vault Settings dialog box, select the Behaviors tab Rules.
Select whether you want to configure rules for files or items from the drop-down list just beneath the Assignment Rules dialog box title.
Select the rule set you want to move, and then click the Move Up or Move Down button as needed.