Basically the US Customs office is the regulating power that oversees knife and cutlery regulations.  During the 1950s, popularized gangland movies and newspapers sensationalized switchblades as weapons of death that roving gangs used to torment and kill their victims.  The reality was that a very limited number of deaths ever occurred on the "streets" due to switchblades.  The reaction though was to control and limit the sale of switchblades in the US and ban all switchblade knife imports.  Over the years many knife owners have realized that only expensive switchblades of the highest quality were every really worth owning.  

Today we have a number of very high quality switchblade knives available, however we also have new innovations such as manual one-handed opening knives featuring thumb studs, assisted, inertia, and other knives featuring methods to reliably open and close a knife with just one hand.  Admittedly this is very handy when one hand is busy holding a 50-75lb bail of hay, aiding a critical emergency victim, or just day to day chores that require use and operation of a knife in one hand and use of the other hand.  Today one-handed knives have become so popular that Buck, Leatherman, Swiss Army, and even some Boy Scout knives feature one handed opening blades... all of which will be illegal if the US Customs changes are enacted.  Yes even your retracting utility knife you use in your garage (AKA a carpet knife) will become illegal under these rules.

Additionally, this ruling could destroy and bankrupt the already weakened cutlery and knife manufacturers with stockpiles of un-saleable inventory.  Let's face it, the economy has not been strong in any industry.

Protect your cutlery and knife ownership rights.  Get more information on the American Knife & Tool Institute's site and contact your State representatives immediately.

More Information Here
American Knife & Tool Institute's YouTube Video explaining the gravity of the knife regulations.