Congratulations, you live in the state with one of the most ill defined knife laws on the books.
Here is the law:
"New Jersey - Code of Criminal Justice
- 2C:39-3 Prohibited Weapons and Devices...
e. Certain weapons. Any person who knowingly has in his
possession any gravity knife, switchblade knife, dagger,
dirk, stiletto, billy, blackjack, metal knuckle, sandclub,
slingshot, cestus or similar leather band studded with
metal filings or razor blades imbedded in wood, ballistic
knife, without any explainable lawful purpose, is guilty
of a crime of the fourth degree.
- 2C:39-1 h. "Gravity knife" means any knife which has a
blade which is released from the handle or sheath thereof
by the force of gravity or the application of centrifugal
force... p. "Switchblade knife" means any knife or similar
device which has blade which opens automatically by hand
pressure applied to a button, spring or other device in
the handle of the knife... u. "Ballistic knife" means any
weapon or other device capable of lethal use and which can
propel a knife blade.
- 2C:39-4. Possession of weapons for unlawful purposes...
d. Other weapons. Any person who has in his possession any
weapon, except a firearm, with a purpose to use it
unlawfully against the person or property of another is
guilty of a crime of the third degree.
- 2C:39-5. Unlawful Possession of Weapons... d. Other weapons.
Any person who knowingly has in his possession any other
weapon under circumstances not manifestly appropriate for
such lawful uses as it may have is guilty of a crime of
the fourth degree.
- - e. Firearms or other weapons in educational institutions...
(2)Any person who knowingly possesses any weapon enumerated
in paragraphs (3) and (4) of subsection r. of N.J.S.2C:39-1
or any components which can readily be assembled into a
firearm or other weapon enumerated in subsection r. of
N.J.S.2C:39-1 or any other weapon under circumstances not
manifestly appropriate for such lawful use as it may have,
while in or upon any part of the buildings or grounds of any
school, college, university or other educational institution
without the written authorization of the governing officer
of the institution is guilty of a crime of the fourth degree."
Thus, as one site put it:
"Apparently you need an explainable lawful purpose to get away with carrying anything besides a dagger/dirk/stiletto, auto, gravity, or balistic knife, which are flat-out illegal. Even then, as in most states, certain less-common knives would probably be "per se" weapons even with an explanation. * NJ state police seem to think all knives are illegal unless the carrier has an explainable lawful purpose. Legally, that probably isn't so, but it may take a court hearing, some lightening of your pockets, and some quality time in jail to sort things out."
The law does not define "lawful purpose" but most people say anticipated self-defense is not a lawful purpose.
And hold up. You want to CARRY your Batleth around? Like stand in line at Safeway with your box of Poptarts and Jujube's with one of these?
Um. I'd leave it home.