The mechanism: The FCC's spectrum auction authority lapsed in March 2023 and sat dead for two years — no new licensed spectrum could legally change hands. The 2025 reconciliation law restored it and did something more consequential than a simple renewal: it put Congress's fingerprints on the calendar. The FCC must identify at least 600 MHz of spectrum between 1.3 GHz and 10 GHz for exclusive licensed use and auction at least 100 MHz of it within two years. The Commission responded by teeing up the Upper C-band (3.98–4.14 GHz) — up to 180 MHz of prime mid-band spectrum — for auction under a statutory deadline of July 2027. Separately, a fight is brewing over CBRS (3.55–3.7 GHz), where an AT&T-backed proposal would push shared-access Tier III users down-band to clear room for a second high-power exclusive-license auction.
That's not abstract telecom-policy trivia. Mid-band spectrum (roughly 1–6 GHz) is the physical input for 5G capacity, and whoever owns exclusive licenses in it can sell service without paying rent to someone else's network. A statutory deadline forces the FCC to actually run the auction rather than let it slip — which means real capital deployment, real license transfers, and a real balance-sheet event for whoever wins.