
Australia has some of the strictest knife laws in the world, and Western Australia is no exception. The Western Australian government has recently updated its laws regarding knives and other edged weapons, with the aim of improving community safety and deterring the carrying of such weapons. This paragraph will explore the legality of various knives in Western Australia, including pocket knives, Swiss Army knives, and other bladed instruments. It will also discuss the penalties for possessing or carrying illegal knives and provide insights into the state's weapons legislation.
| Characteristics | Values |
|---|---|
| Legal Definition of Knife | Any instrument with a cutting edge or blade, and designed to be used as a weapon |
| General Law | Illegal to carry any type of knife in a public place except for utility knives like Swiss Army knives or pocket knives with a blade no longer than 10 cm |
| Age Restriction | Illegal for anyone under 18 to buy, possess, use, or carry a knife |
| Import and Manufacturing | Illegal to import, manufacture, sell, or possess a knife made from prohibited materials without appropriate permits |
| Possession | Illegal to possess a knife that has been modified to make it suitable for use as a weapon |
| Western Australia Specific | Western Australia is the only place that allows people to carry pepper spray or OC sprays without a permit for self-defence |
| Edged Weapons | Includes but is not limited to knives, machetes, sickles, scythes, axes or axe heads |
| Penalties | A maximum penalty of three years imprisonment and a fine of $36,000 for carrying an edged weapon without a lawful excuse |
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What You'll Learn

Carrying a knife in Western Australia
Western Australia has some of the strictest knife laws in the country, with penalties for offences involving knives and other edged weapons. The Western Australian government has made changes to the Criminal Investigation Act 2006 and Weapons Act 1999 through the Police Legislation Amendment Act 2024 to improve community safety and deter the carriage of edged weapons, including knives.
In Western Australia, it is illegal to carry any type of knife in a public place, except for utility knives such as a Swiss Army knife or a pocket knife, with a blade no longer than 10 cm. It is important to note that pocket knives are considered illegal in other states and territories of Australia. In Western Australia, you must have a valid reason for carrying a knife, and it should not be concealed.
Knives that are prohibited in Western Australia include flick knives, butterfly knives, swords, machetes, spears, and any knife with a double-edged blade. These knives are illegal to possess in any public place and can result in a prison sentence of up to 14 years. Additionally, it is illegal to import, manufacture, sell, or possess a knife made from prohibited materials, such as ceramic or plastic, without the appropriate permits.
The Western Australian government has created a new category of "edged weapons," which includes knives, machetes, sickles, scythes, axes, or axe heads. Possessing or carrying an edged weapon without a lawful excuse is an offence punishable by up to three years in prison and a fine of $36,000. Furthermore, it is illegal to sell or supply an edged weapon to a person under 18 years of age, with the same maximum penalty.
It is important to note that Western Australia has different laws regarding the use of weapons for self-defence compared to other states and territories. Western Australia is the only place in Australia that allows individuals to carry pepper spray or OC sprays without a permit for self-defence purposes. However, carrying a knife with the intent to use it against another person is illegal in Western Australia.
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Selling or supplying knives
In Western Australia, it is illegal to sell or supply knives that are classified as "prohibited weapons". These include knives designed for use in a way that is likely to cause serious harm, such as switchblades, butterfly knives, ballistic knives, and other similar weapons. It is also illegal to sell or supply knives made from prohibited materials, such as ceramic or plastic, without the appropriate permits. Additionally, it is illegal to sell or supply knives to minors under the age of 18. The maximum penalty for selling or supplying a knife to a minor is three years' imprisonment and a fine of $36,000.
Western Australia has unique weapons laws that differ from other states and territories in Australia. In WA, it is legal to carry pepper spray or OC sprays for self-defence without a permit, while in other states and territories, it is illegal to carry or use any weapon, including knives, without a valid permit or license. It is important to note that even within WA, there are strict regulations and penalties for the sale and supply of knives.
When selling or supplying knives in Western Australia, it is crucial to be aware of the legal definition of a knife, which is any instrument with a cutting edge or blade designed to be used as a weapon. Some knives, such as utility knives like Swiss Army knives or pocket knives with blades no longer than 10 cm, are generally allowed to be carried in public. However, prohibited knives, such as flick knives, butterfly knives, swords, machetes, spears, and any knife with a double-edged blade, cannot be bought, sold, used, or possessed unless the user has a valid reason and a permit.
As a seller or supplier of knives in Western Australia, it is your responsibility to ensure that you are compliant with the relevant laws and regulations. This includes understanding the classification of knives as "prohibited weapons" or "controlled weapons" and being diligent in assessing your customers' reasons for purchasing knives. It is also important to stay updated with the latest amendments to the Weapons Act 1999, which includes the creation of the "edged weapon" category, placing stricter controls on the sale and supply of knives and other similar weapons.
By following the legal guidelines and exercising caution, you can ensure that you are operating within the law and contributing to community safety by deterring the misuse of knives and edged weapons in Western Australia.
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Knives as self-defence tools
Australia has some of the strictest knife laws in the world, and Western Australia is no exception. The state has recently updated its laws to include stricter penalties for offences involving knives and other edged weapons. Under the Weapons Act 1999, knives fall into the 'edged weapon' category, which includes any instrument with a cutting edge or blade designed to be used as a weapon.
It is essential to understand that in Western Australia, it is illegal to carry any knife in a public place, except for utility knives such as a Swiss Army knife or a pocket knife, with a blade no longer than 10 cm. Possessing, using, or carrying an illegal knife can result in severe penalties, including fines or even imprisonment.
When considering knives as self-defence tools, it is crucial to weigh the pros and cons of different types of knives. Fixed blade knives, for instance, offer a robust and reliable option for self-defence, as they do not require deployment and are always ready for use. However, they may be challenging to conceal and carry discreetly. On the other hand, folding knives are more convenient to carry and provide quicker deployment in self-defence scenarios. Assisted opening or a thumb stud can be crucial in quickly accessing your knife during a surprise attack.
The size of your self-defence knife is also a critical factor. A knife that is too large can be cumbersome and difficult to conceal, while a smaller knife might not provide adequate defence. A good balance is essential to ensure effectiveness in self-defence and practicality for everyday carry. Knives ranging from 6 to 8 inches in overall length are generally recommended as they are easier to conceal and carry.
While knives can be considered a self-defence tool, it is important to note that they are not always the most effective option. In many cases, pepper spray, a tactical flashlight, or even a simple tool like a pointed knuckle keychain can be more practical and effective for protection. Additionally, developing situational awareness, improving physical fitness, and taking self-defence or martial arts classes can be more valuable in protecting yourself without the potential legal consequences of carrying a knife.
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Penalties for knife offences
Knife laws in Australia are some of the strictest in the world, and Western Australia has recently introduced stricter penalties for offences involving knives and other edged weapons. These laws aim to improve community safety and deter the carrying of knives in public.
The Western Australian government has amended the Criminal Investigation Act 2006 and the Weapons Act 1999 through the Police Legislation Amendment Act 2024. These changes came into effect on 20 December 2024 and include harsher penalties for offences involving edged weapons.
The amendments to the Weapons Act 1999 introduce new offences, such as carrying or possessing an edged weapon without a lawful excuse, which includes knives, machetes, sickles, and axes. The maximum penalty for this offence is three years' imprisonment and a fine of $36,000. Additionally, it is now an offence to sell or supply an edged weapon to a person under 18 years of age, with the same maximum penalty of three years' imprisonment and a $36,000 fine.
Refusing to comply with a police officer's demand to produce a weapon or permit is also an offence, attracting a maximum penalty of 12 months' imprisonment and a $5,500 fine. The police may also conduct non-invasive metal detector scans to detect knives and other edged weapons. Refusing to participate in these scans without a reasonable excuse carries a maximum penalty of 12 months' imprisonment and a $12,000 fine.
It is important to note that the penalties for knife offences can vary depending on the specific circumstances of each case and the jurisdiction. In New South Wales, for example, carrying a knife in public can result in a fine of $550, or up to two years' imprisonment and a $2,200 fine if dealt with in court.
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Categories of knives
In Australia, knives are broadly classified into two categories: prohibited and restricted. Prohibited knives are those that cannot be bought, sold, used, or possessed unless the user has a valid reason for doing so. Restricted knives, on the other hand, may have certain restrictions on their use, sale, or possession.
Prohibited Knives
Prohibited knives include flick knives, butterfly knives, swords, machetes, spears, and any knife with a double-edged blade. These knives are typically illegal to possess in any public place and can carry severe penalties, including hefty fines and imprisonment.
Restricted Knives
The legality of restricted knives may vary across different states and territories in Australia. For example, in New South Wales, certain knives are classified as 'controlled weapons', which means they can only be kept at home and must not be carried in public. Similarly, in Victoria, utility knives with a blade longer than 10 cm are prohibited from being carried in public.
Edged Weapons
Western Australia has introduced the category of 'edged weapons', which includes knives, machetes, sickles, scythes, axes, or axe heads. Possessing or carrying an edged weapon without a lawful excuse is considered an offence, and offenders may face penalties of up to three years in prison and a fine of $36,000.
Other Restricted Items
In addition to knives, there are restrictions on other items that can be used as weapons. This includes items made from prohibited materials, such as ceramic or plastic, or items modified to be used as weapons, like knives with longer blades or sharpened points. It is also illegal to possess or use weapons such as knuckle dusters, grenades, and other deadly weapons without a special permit or exemption.
It is important to note that Western Australia has unique weapons laws that differ from other states. For instance, it is the only place in Australia that allows people to carry pepper spray or OC sprays without a permit for self-defence purposes.
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Frequently asked questions
In Western Australia, it is illegal to carry any type of knife in a public place, except for utility knives such as a Swiss Army knife or a pocket knife with a blade no longer than 10 cm.
Knives that are illegal to carry include switchblades, balisongs, flick knives, daggers, throwing knives, and shurikens.
The penalties for carrying an illegal knife in Western Australia can include a fine or even a jail sentence. The maximum penalty is three years imprisonment and a fine of $36,000.
In addition to knives, Western Australia has strict laws prohibiting the carry of other weapons. These include swords, machetes, spears, and any other "edged weapons." Western Australia is the only state that allows people to carry pepper spray or OC sprays without a permit for self-defence.











































