This amendment was produced to meet the need for the implementation of the International Emergency Preference Scheme (IEPS) for disaster recovery operations as specified in ITU-T Rec. E.106. This amendment contains the modifications to ITU-T Rec. Q.763 (1999) in order to accommodate these needs. It should be read in conjunction with Amendment 3 to ITU-T Rec. Q.761, Amendment 3 to ITU-T Rec. Q.762, and Amendment 4 to ITU-T Rec. Q.764. This amendment incorporates Amendment 2 to ITU-T Rec. Q.763 and provides enhancements.