What are New Jersey’s knife laws?

The following information was copied from the website Knife Up. There you can find additional information about your state.
NOTE: I made minor spelling corrections and separated some lines of text to increase clarity of reading. I did not rewrite or change any of the contents to alter their meanings.
New Jersey Knife Laws

New Jersey Knife Laws:
New Jersey knife laws are wordy and oftentimes difficult to understand if one does not have formal legal education or training. This article takes New Jersey code and case law concerning knife ownership and carry and puts it into a language that makes it easy for anyone to understand what is legal and what is not.
What is Legal to Own?
It is legal to own a Balisong, or butterfly knife.
It is legal to own disguised knives like lipstick knives.
It is legal to own a Bowie knife.
It is legal to own throwing stars and throwing knives.
Any weapon for which a person has an explainable lawful purpose for owning.
What is Illegal to Own?
It is illegal to own any weapon, with the purpose to use it unlawfully against the person or property of another.
It is illegal for a person convicted of certain crimes (see below) to own a gravity knife, switchblade, dirk, dagger, stiletto, or other dangerous knife.
It is illegal for certain mentally ill people to own a gravity knife, switchblade, dirk, dagger, stiletto, or other dangerous knife.
It is illegal to own a gravity knife, switchblade, dirk, dagger, stiletto, or other dangerous knife with any explainable lawful purpose.
A conviction for aggravated assault, arson, burglary, escape, extortion, homicide, kidnapping, robbery, aggravated sexual assault, sexual assault, bias intimidation, possession of a prohibited weapon, possession of weapon for an unlawful purpose, manufacture or transport of a prohibited weapon, unlawful possession or sale of a controlled dangerous substance, or endangering the welfare of a child prevents a person from owning certain types of knives in New Jersey.
Definition of Weapon:
The New Jersey legislature has defined weapon as anything “readily capable of lethal use or of inflicting serious bodily injury”. It further states that the term includes gravity knives, switchblade knives, daggers, dirks, stilettos, or other “dangerous” knives. In 1982, in State v. Brown, the New Jersey Appellate Court found that a person does not need to intend to use a knife as a weapon in order for it to be considered a dangerous knife, and therefore a weapon. This decision can make it difficult for a person to determine if a particular knife is legal to own, as it could be considered a dangerous knife, even if the owner has no intention of using it to harm another. However, because New Jersey law allows for the possession of a dangerous knife, by those who have a legal purpose for owning them, any knife may be considered legal if owned for a “lawful purpose”.
Definition of Lawful Purpose:
The phrase “lawful purpose” was challenged in State v. Blaine, when Mr. Blaine was discovered carrying a folding knife with a 4 inch blade. The Court reasoned that because the knife carried by Mr. Blaine was not a gravity knife, switchblade knife, dagger, dirk or stiletto, those knives specifically mentioned by new Jersey statute as weapons, the defendant may escape a guilty finding, if the state cannot prove that he carried the knife for an unlawful purpose. As such, because there was no proof that Mr. Blaine did not carry the knife for a lawful purpose, he could not be found guilty of carrying an illegal weapon. The Blaine Court cited State v. Lee, in which the legislature’s intent, when enacting the law prohibiting the carrying of certain knives, was examined. In Lee, the Court described this intent as addressing:
“…the situation in which someone who has not yet formed an intent to use an object as a weapon possesses it under circumstances in which it is likely to be so used. The obvious intent of the Legislature was to address a serious societal problem, the threat of harm to others from the possession of objects that can be used as weapons under circumstances not manifestly appropriate for such lawful uses as those objects may have. Some objects that may be used as weapons also have more innocent purposes. For example, a machete can be a lethal weapon or a useful device for deep sea fishing.”
In 2000, the New Jersey Supreme Court further clarified “lawful purpose” in State v. Burford, by describing two categories of deadly weapons as well as a third category of weapons, that it said may take on the characteristics of a deadly weapon, but that may also have a wide variety of lawful uses. The Court said that when determining whether a defendant possessing a weapon that falls within this third class of weapons is guilty of the unlawful possession of a deadly weapon, one must look at the circumstances under which it is possessed.
Exceptions to Unlawful Possession of a Knife:
A person may not be convicted of the unlawful possession of a knife if he or she is carrying the knife for hunting or fishing purposes, the knife is legal and appropriate for hunting or fishing, and the person has a valid hunting or fishing license. A person is also exempt from the unlawful possession statue if he or she is transporting a legal knife to or from a place for the purpose of hunting or fishing, so long as he or she has a valid hunting or fishing license. When carrying a knife for such purposes, the statute requires that it be locked in a box or the trunk of the vehicle in which it is being transported.
Restrictions on Carry:
New Jersey statute does not impose any restrictions on the carrying of any legal knife. However, if a defendant is found carrying a gravity knife, switchblade knife, dagger, dirk, or stiletto (those knives specifically mentioned by New Jersey statute as a weapon), he or she may be charged with possession of a dangerous weapon, if there are circumstances which may lead one to believe that the knife is being possessed for an illegal purpose.
Definitions of Various Types of Knives:
New Jersey code, 2C:39-1 defines a gravity knife as any knife that has a blade, which is released from the handle by the force of gravity or the application of centrifugal force (spinning the knife around). It also provides a definition for the term switchblade knife, which means any knife or instrument that has a blade, which opens automatically by pressing a button, spring, or other device on the handle. A ballistic knife, according the New Jersey statute is a weapon or other instrument capable of lethal use and which can propel a knife blade.
Knives Found in Vehicles:
New Jersey code 2C:39-2, provides that when a weapon is found in a vehicle, it will be presumed to be in the possession of all of the occupants of the vehicle unless:
It is found on the person of one of the occupants, then it will be considered to be in his or her possession, OR
The weapon is out of view of the occupants (such as in the glove box), then it will be presumed to be in the possession of the person having access to such space, (the driver, owner, or person who rented or leased the vehicle), OR
The vehicle is a cab and the weapon is found in the passenger compartment, in which case it will be presumed to be in possession of all of the passengers and if there are no passengers, it will be presumed to be in possession of the driver of the cab.
Conclusion on New Jersey Knife Law:
While persons who have been convicted of certain crimes or who are mentally ill may not possess dirks, daggers, switchblades, stilettos, or gravity knives, anyone else may own any type of knife they wish, as long as they have a lawful purpose for owning it, and do not intend to use it to harm another or his or her property.
New Jersey knife carry laws are quite unrestrictive, allowing for the open or concealed carry of any legal knife.
The laws in New Jersey are very vague about when it is legal to possess or carry a dirk, dagger, switchblade, stiletto, or gravity knife, and anyone carrying any of these knives in New Jersey should be very careful to avoid any circumstances, which may indicate that he or she is not carrying the knife for a legal purpose.
Sources:
N.J. Stat. § 2C:39-1 (2013)
N.J. Stat. § 2C:39-2 (2013)
N.J. Stat. § 2C:39-4 (2013)
N.J. Stat. § 2C:39-5 (2013)
N.J. Stat. § 2C:39-6 (2013)
N.J. Stat. § 2C:39-7 (2013)
State v. Brown, 185 N.J. Super. 449 A.2d 1314 (App.Div. 1982)
State v. Blaine, 533 A.2d 980 (1987 N.J. Super.)
State v. Burford, 746 A.2d 998 (2000 N.J. Super.)
Because of the vagaries of NJ state knife laws, if you have any questions or concerns about the legality of a knife in your possession or thinking of buying, it is recommended to seek legal advice to avoid being charged.

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