Most epic feats have prerequisites. A character must have the listed ability score, feat, skill, class feature, or base attack modifier in order to select or use that feat. A character can gain an epic feat at the same level at which he or she gains the prerequisite, just as with regular feats. A prerequisite expressed as a numerical value is a minimum; any value higher than the one given also meets the prerequisite. A character can't use an epic feat if he or she has lost a prerequisite.