If you look on your left of this sentence, you'll see I am from belgium.
The law you described is, and has been, enforced here a long time ago.
It states that any knife, which has some sort of a locking device is illegal if the circumstance does not make you carry a knife. Most polpular circumstances: hunting, camping, fieldtrips.....
Basically, since cops have no right searching you here unless you give them a good reason, this means that criminals are in problems carrying even a SAK, while normal people, like me (I live in a farm-area), can carry a knife at choice, but concealed. If you should carry a sword, they will arrest you.
The same goes in the Netherlands. The circumstances in which the knife is found in your hand or pocket dictate if it's illegal or not.
I have carried a spyderco endura for a few years now. It's an excellent folder for general (hard) use, and an excellent self defense folder too, altough I never used it in combat and hope I never need to.
No-one has even asked questions about the folder.
The only down part is the fact that knives are often looked at as plain and simple weapons. All other functions become obsolete when the illegal aspect is so popular.
That's why you'll find so few knifemakers and collectors in Belgium and the Netherlands, while france has a big reputation in this field.
greetz, Bart.
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"If the world wouldn't SUCK, we'd all fall off !"
member of the BKS
http://www.expage.com/belgianknives