The Federal Aviation Administration has issued a landmark notice of proposed rulemaking that officially lifts the 1973 prohibition on civil supersonic flight over the continental United States. US Transportation Secretary Sean P. Duffy announced the pivotal shift toward a noise-based certification standard. Under this new framework, advanced aircraft will be legally permitted to fly faster than Mach 1 provided their sonic signature does not exceed a ground-level overpressure of 0.11 pounds per square foot. The updated policy directly follows Executive Order 14304 and aims to unleash American innovation while safely returning high-speed commercial travel to domestic skies.Aerospace engineering has evolved significantly since the era of the Concorde. Recent technological milestones have proven that sonic booms can be successfully mitigated and transformed into a faint atmospheric thump. Boom Supersonic shattered the sound barrier with its XB-1 demonstrator aircraft over the Mojave Desert in early 2025. This historic test flight validated the company's Boomless Cruise technology. By utilizing a physics concept called Mach cutoff, the demonstrator flew at specific altitudes and speeds that allowed the sonic boom to refract into the atmosphere before ever reaching the ground. NASA also verified similar noise-reduction theories when its X-59 experimental aircraft achieved supersonic flight in June 2026.Private aerospace firms are moving aggressively to capitalize on the modernized regulatory landscape. Boom Supersonic is actively developing the Overture commercial jetliner to serve the world's leading airline fleets. Major carriers including United Airlines, American Airlines and Japan Airlines have already secured orders for the all-premium cabin aircraft. The jet promises to deliver vast improvements in travel efficiency with passenger fares comparable to current business class pricing. The integration of advanced aerodynamics and sustainable aviation fuel compatibility positions the aircraft as a formidable catalyst for a new era of global transit.Regulators plan to finalize the overland flight rules by mid-2027. Officials expect to introduce secondary regulations covering landing and takeoff noise standards later this year. This aggressive timeline provides manufacturers with the precise guidance required to complete their futuristic engine designs and begin large-scale production. Ending the half-century speed limit represents a monumental cultural shift for the aviation industry and promises to radically alter how modern society connects across vast distances.