Timeline for Modifications 501 and 501A 2015 QSEC Allocation Initial Invite * Users respond NG notify outcome Within 10 BD Within 10 BD Within 5 BD Within 5 BD Final invite Users respond NG notify outcome Within 10 BD Within 5 BD Within 10 BD NG update systems * A general notification will be issued 5 BD prior to the Initial invite

Timeline for Modification 501B 2015 QSEC Allocation Initial Invite Users respond NG notify outcome * Within 10 BD Within 10 BD Within 5 BD Within 5 BD Final invite Users respond NG notify outcome Within 10 BD Within 5 BD Within 5 BD Return Option Users respond NG notify outcome NG update system Within 10 BD Within 5 BD Within 10 BD * A general notification will be issued 5 BD prior to the Initial invite