been legally classified as an offensive weapon since January 1989. Carrying one in public is an offence under the Prevention of Crime Act 1953. Sale, lending, hiring, giving or importing is prohibited by the Criminal Justice Act 1988, as amended by the Offensive Weapons Act 1996. Any imported are liable to be seized and prosecution may follow. An exception is made for knives of this type over 100 years old, which are classed as antiques. In some parts of the United States, it is illegal to possess or carry such a knife in public. In certain jurisdictions, balisongs are categorized as a "gravity knife", "switchblade", or "dagger". In California, balisong/switchblade knives are legal to own, buy, sell, and transport if the length of the blade is not more than . If the length of the blade is more than they are illegal to buy, sell, transfer, or possess in public although it is legal to possess one if kept at home. (Penal Code section 17235 & 21510.) In Hawaii, it is illegal to possess, manufacture, sell, transfer, or transport any balisong/Butterfly-type knife. In Kansas, there were once legal restrictions on butterfly knives, however, , the Kansas Comprehensive Knife Rights Act decriminalized the carrying of all types of bladed weapons. In Illinois, it is legal to own and carry a butterfly knife. In Chicago it is illegal to carry a concealed knife with a blade longer than . Concealed carry of a double-edged knife is prohibited. Automatic (switchblade) and gravity knives are prohibited. In Indiana it is legal to own and carry a butterfly knife both open or concealed. In Kentucky, the balisong is legal for concealed and open carrying anywhere one is not otherwise prohibited from carrying a concealed deadly weapon. Kentucky's constitution and revised statutes prohibit cities and counties from enacting weapons laws and restrictions. In Maine, it is legal to own, sell, and carry. In Massachusetts, the balisong is legal for concealed and open carrying so long as it does not "[present] an objective threat of danger to a person of reasonable and average sensibility." Restrictions also apply depending on the area of the person carrying the knife (such as within a public school). In Michigan, the balisong is legal because it is classified as a "folding knife". In New Jersey the criminal law, NJSA 2C:39-1, suggests balisongs are illegal but the question of legality or illegality is