One report required by the UGESP is a determination of whether selection procedures have an adverse impact on one or more protected groups. An adverse impact occurs when the selection rate for a protected class is less than 4/5ths, or 80 percent, of the selection rate for the group with the highest selection rate. This is often referred to as the 4/5ths rule or the 80 percent rule. Table 4.5 illustrates an adverse-impact calculation.