Requirements are used to handle items you need to track or charge for the event. The requirements are displayed in the Events Window in the order they appear in this list.
The requirement editing buttons are:
Add a new requirement
Delete the selected requirement (note: all recorded information for this particular event and requirement is lost).
move the requirement Up the list.
move the requirement Down the list.
NOTE: You can also copy requirements from another event by selecting and dragging them from another Event Editor Window.