What do the different values mean when setting up an Absence Rule?

When adding/editing an Absence Rule, a page similar to the following is shown:

The different values on the screen are explained section-by-section below (expand each to find out morel):

 

TIP: Several of the screen areas above will only be displayed if certain settings, indicated above are selected. If a value is not required for a certain configuration of an Absence Rule, it is not visible on the screen. This removes any confusion for the user when they are entering their details. It also ensures only the necessary details need be entered.