THE PURPOSE OF THIS CONTRACT IS TO PROVIDE THE SUSTAINING ENGINEERING (SE) ACTIVITIES, RESPONSIBILITIES, AND INTERFACES BETWEEN THE GODDARD SPACE FLIGHT CENTER (GSFC) AND NASA/JOHNSON SPACE CENTER (JSC)/INTERNATIONAL SPACE STATION (ISS) IN SUPPORT OF THE EXPRESS LOGISTICS CARRIERS (ELC) AND UTILIZATION AND LOGISTICS FLIGHT (ULF)-5 & 6 MISSIONS. AS DESCRIBED IN THE STATION PROGRAM IMPLEMENTATION PLAN, VOLUME 10: SUSTAINING ENGINEERING STATION PROGRAM IMPLEMENTATION PLAN (SSP 50200-10), THE ISS PROGRAM'S SUSTAINING ENGINEERING OFFICE HAS THE OVERALL RESPONSIBILITY FOR SUSTAINING ENGINEERING OF THE ISS. EVEN THOUGH, THE OVERALL SUSTAINING ENGINEERING INTEGRATION RESPONSIBILITY BELONGS TO ISS, IN ADDITION TO HARDWARE AND SOFTWARE DELIVERIES GSFC IS RESPONSIBLE FOR PROVIDING SUSTAINING ENGINEERING AND WORKING TOGETHER WITH OTHER NASA CENTERS TO ENSURE THE CONTINUED FLIGHT WORTHINESS OF THE ELC. THIS SE CONTRACT APPLIES TO THE ACTIVITIES TO BE PERFORMED AS SUPPORT TO THE ELC DURING BOTH ON-GROUND AND IN-FLIGHT PHASES OF SE EFFORTS. THE SE TASKS WILL BE FOR SUPPORTING THE MISSION PREPARATION, THE FLIGHT OPERATIONS, AND THE POST-FLIGHT ACTIVITIES THAT MAY OCCUR AFTER FINAL DELIVERY.