The FAA has officially proposed repealing the 1973 ban on civil supersonic flight over U.S. land, replacing it with an interim noise-based standard that permits routine overland flights up to Mach 1.3 without requiring a Special Flight Authorization. This Notice of Proposed Rulemaking, published 30 June 2026, establishes a new overpressure limit of 0.11 pounds per square foot at surface level, allowing aircraft to exceed Mach 1 if evanescent waves and secondary sonic booms do not produce disruptive noise reaching the ground. The rule directly fulfills President Trump’s June 2025 Executive Order 14304, enabling manufacturers like Boom Supersonic and Spike Aerospace to plan commercial routes over continental U.S. territory rather than restricting operations to offshore areas. While the proposal addresses en-route sonic boom, landing and takeoff noise standards remain pending for future rulemaking, with final regulations expected by mid-2027.