Versions of 50 USC 2538f - Earned value management and technology readiness levels for life extension programs on LawServer 2024 50 USC 2538f – Earned value management and technology readiness levels for life extension programs 2023 50 USC 2538f – Earned value management and technology readiness levels for life extension programs 2022 50 USC 2538f – Earned value management and technology readiness levels for life extension programs 2021 50 USC 2538f – Earned value management and technology readiness levels for life extension programs