The FAA has officially proposed repealing the 1973 prohibition on civil supersonic flight over U.S. land, replacing it with an interim noise-based certification framework mandating surface overpressure no greater than 0.11 psf. This Notice of Proposed Rulemaking, issued under Executive Order 14304, eliminates the need for Special Flight Authorization for compliant aircraft and sets a path for next-generation supersonic designs to operate at speeds up to Mach 1.3 without disruptive sonic booms reaching the surface. The agency aims to finalize both en route and landing/takeoff noise rules by mid-2027, with a second NPRM on LTO noise expected in December 2026. The framework currently applies to domestic flights, though international coordination is underway.