The CPSC...
The CPSC was a very weird Federal government bureau which began flexing its muscles during the mid 1970s. They were extremely overzealous when it came to bicycles. Because bicycles "could" be used by children (and, admittedly, in the US this was once the most common bike market), ALL bicycles suddenly fell into the category of "toys" - regardless of the age of the likely buyer or the size of the bike.
Examining our Toys, the CPSC bureaucrats decided that certain "sharp edged parts" on a bike could cause a severe gash to the "child" if the bike were to crash and impact that part against a leg... and this is where they noticed the potential cutting blade edge of the Campy front derailleur cage plate. Ironically, they somehow they neglected to focus on that circular saw blade directly below it (which we refer to as a chainwheel)... which was very fortunate for us all - otherwise, we might have been riding with Campy chainguards on our US-legal racing bikes, as well!
Around 1974 they had also (very seriously) proposed legislation making it mandatory to have reflectors mounted on all bikes which a car could see from a certain distance and "at any angle" to the bike, which in all sincerity they estimated would require some 27 different plastic reflectors positioned at various angles - Yes, they were absolutely serious!
As time passed, they gradually relaxed this blanket idiocy regarding all bicycles. And under pressure from bicycle manufacturing industry and retail merchant lobbys in Washington they also quietly backed off on the deadly derailleur issue too. All that now remains of those early Stalinist mandates is the current requirement for a front, rear, and two wheel mounted reflectors - those nasty things which we all immediately remove from any bike which we buy new in the US. My local bike shop has an entire barrel of the discarded take-off reflectors in case anyone ever wants to re-mount one... and I actually did salvage and mount one on the bracket of a rear luggage rack which I had mounted for an aged neighbor (at her request, of course).