“President Trump has issued an executive order ‘leading the world in supersonic flight’ which requires the Federal Aviation Administration to remove restrictions on supersonic flights within U.S. airspace. The existing noise rules have been in place since 1968, and a corresponding FAA restriction on flights exceeding Mach 1 established in 1970. These rules previously prevented Concorde operations on transcontinental flights.

The FAA has reviewed this rule in recent years but made no changes to the overland flight restriction. The new Trump executive order requires the FAA to repeal its ‘prohibition on overland supersonic flight, establish an interim noise-based-certification standard, and repeal other regulations that hinder supersonic flight.’

The FAA would need to repeal the prohibition on overland supersonic flight in 14 CFR 91.817 within 180 days and issue a Notice of Proposed Rule Making to establish a standard for supersonic aircraft certification within 18 months of the order.”

From Forbes.