Like most of the weapon laws worldwide it seldom makes much difference what you're carrying or how you're carrying it. In practice those laws are basically not about carrying a knife, they are about such things as being of the wrong race or ethnicity, the wrong age, wearing the wrong clothes, being in the wrong place at the wrong time, having a previous criminal record (often for one of the above rather than committing a real crime), acting guilty or sassy instead of confident when a cop interviews you ...
That's why the laws are written so vaguely, so as not to let issues of what you're carrying or how you're carrying it interfere with the real reason for the law. Asking for clarification is not going to get you anywhere; the fascists do not want to clarify. They won't tell you how blade length is measured or what concealed or open carry means -- they won't tell anybody, so we can't tell you either.
The defense "If it was concealed how did you know it was there?" ought to be an automatic winner ... and "How many of you jury members do the same thing or have friends and relations who do?" "Joe Blow got tried for the same thing two years ago and he was aquitted," too. Things ain't always what they ought to be.
-Cougar Allen :{)