Clarity Any
It is possible by navigating to Administration->Notification and selecting notification below
Notification Name = Action Item - New non-recurring project action item
Notification ID = NEW_ACTION_ITEM_FILE_NON_RECURRING
Description = New non-recurring, project action item
Note Notification Name: Action Item (Process) - New action item is the one used for non project based object, for example you can use for custom object or non project object. For project object Action Items use notification mentioned above such as Description = New non-recurring, project action item.