Before discussing the Mandatory (mando) rule, let's take a look at why or how mandos should be used in course designs. Some feel mandatories are a design crutch and should never be used. When a course designer has full control to develop a layout and unlimited budget, mandatories can usually be avoided. But how often do designers have that luxury? In some cases, mandatories are not part of the original course design. However, storm damage or structural changes in the park require hole designs or locations to change where a mando or two might be appropriate.