The Federal Aviation Administration has recently issued a new sonic boom regulation tht bans nearly all supersonic flight by civil aircraft over the United States and its territorial waters. The regulation, which became effective April 27, 1973, prohibits the operation of civilian aircraft at speeds greater than March 1 without authorization from the agency.

The policy underlying this regulation puts the burden of establishing the environmental acceptability of supersonic civil aircraft flight on the proponent, rather than on the affected public. However, the FAA has also made available reasonable opportunity for aircraft manufacturers to prove the environmental acceptability of supersonic flight if they are able to control sonic boom research without harmful effects on the public.