What actually disappears on October 1: the federal data-center rulebook goes dark
The FDCEA is less a single rule than a baseline operating standard for every facility a federal agency owns, operates, or maintains. It bundles five concrete obligations into one statute: keeping facilities available and uptime-resilient, sourcing sustainable energy, hardening against power failure, defending against physical intrusion and natural disasters, and enforcing IT security protections [1]. The teeth, though, live in OMB Memorandum M-25-03, the January 2025 implementation guidance that translates the law into procurement practice. M-25-03 requires agencies planning a new data center or a major upgrade to commission assessments by certified energy-efficiency specialists and to formally weigh energy and water consumption before building [4]. Both the statute and that guidance carry the same expiration stamp: September 30, 2026 [4]. The mechanism of the lapse is therefore unusually clean. There is no partial wind-down, no grandfathering language being negotiated in public. On October 1, the assessment requirement simply ceases to bind, and agencies that were obligated to measure the energy and water footprint of a new build are no longer obligated to do anything at all [2]. The reporting that surfaced the lapse came via Wired and was amplified by The Register and Gizmodo; it is an article-driven story, not a leak of draft replacement text, because no replacement text appears to exist [1].
