Knife Offences SA: Carrying, Prohibited Weapons and the 2025 Reforms
Knife and weapons offences in South Australia
South Australia rewrote its knife and weapons laws in three stages between March 2025 and July 2026. The knife offences SA police charge do not ask whether you are a dangerous person. They ask where the knife was, what it was, and whether you had a lawful excuse. That is how a tradesperson with a work knife in the ute ends up charged. Every hour matters, so book a same-day free 30-minute consultation or call (08) 7094 2021.
Knife and weapons offences: key facts
| Issue | Position in South Australia |
|---|---|
| Where the law is | Part 3A of the Summary Offences Act 1953 (SA), not the firearms legislation. Knives in section 21E; offensive weapons and dangerous articles in section 21C; prohibited weapons in section 21F with the list in regulation 6 of the Summary Offences Regulations 2016 (SA). |
| The main charge | Possessing a knife in a public place, an education facility or a place of worship without lawful excuse, section 21E: $2,500 or 6 months for a first offence, $5,000 or 12 months for a subsequent offence. |
| The heavy charge | Dealing in, using or possessing a prohibited weapon, section 21F(1): $20,000 or 2 years. Machetes and swords have been prohibited weapons since 1 July 2025. |
| The range | From $1,250, for example for an entitled person's unsafe possession of a prohibited weapon (section 21F(14)), up to $35,000 or 4 years for supplying a knife to a minor the supplier knew, or ought reasonably to have known, intended or was likely to use it in a serious offence of violence (section 21DA(1)). |
| Which court | Magistrates Court. Every Part 3A offence on this page carries 2 years or less, or a fine only, and is a summary offence, except section 21DA(1). With a 4 year maximum, that offence is a minor indictable offence, dealt with in the Magistrates Court unless the defendant elects trial in a superior court (Criminal Procedure Act 1921 (SA), sections 5 and 108). |
| What the prosecution must prove | For section 21E: possession of a knife, which includes a blade, in an education facility, place of worship or public place. The words "without lawful excuse" are written into sections 21C and 21E. Section 21F has no such words: for a prohibited weapon, an exemption under Schedule 2 or a Ministerial declaration is a defence the defendant must prove (section 21F(2)). |
| The defence that decides most cases | Lawful excuse: a real connection between the item and a lawful use, that the reason still held at the time and place, and corroboration. |
| Search powers | Part 14C of the Act, in force since 12 March 2025: area authorisations by a Superintendent for up to 24 hours (section 66Y), Commissioner authorisations for a public place for up to 6 hours (section 66Z), searches of people found guilty of a prescribed offence, or members of a criminal organisation, within the last 5 years (section 66ZA), and metal detector searches at licensed premises and at declared places of worship, public events, shopping precincts, transport hubs and transport services (section 66ZB). |
| Three commencement dates | 12 March 2025 (search powers), 1 July 2025 (possession, sale and supply changes, with machetes and swords added to the prohibited weapons list by regulation), 1 July 2026 (retail duties). A machete exemption for gardening or camping in the amending Act has not commenced. The version of the Act that applies is the one in force on the offence date. |
| First step | Same-day free 30-minute consultation. Call (08) 7094 2021. |
What are knife offences in SA?
Knife offences in SA sit in Part 3A of the Summary Offences Act 1953 (SA) (the Act), not in the firearms legislation. The main offence is possessing a knife in a public place, an education facility or a place of worship without lawful excuse, which carries a maximum of $2,500 or 6 months imprisonment for a first offence.
Part 3A holds several families of offence, and three of them catch people carrying or keeping weapons. Knives fall under section 21E. Offensive weapons, which by definition include a knife, and dangerous articles fall under section 21C. Prohibited weapons fall under section 21F, where the list is set by regulation rather than by the Act.
The maximum jumps from $2,500 to $20,000 between the first family and the third, so the section on the charge sheet matters as much as the facts. These are summary offences in SA, which shapes where the matter is heard. This page sits within our guide to firearms and weapons offences in South Australia. Its figures are current to the Act and the Summary Offences Regulations 2016 (SA), each as in force from 1 July 2026.
If police have seized a knife and told you to expect a summons, the useful work starts now. Book a same-day free 30-minute consultation, or call (08) 7094 2021.
On this page
What changed in South Australia’s knife laws in 2025 and 2026?
The Summary Offences (Knives and Other Weapons) Amendment Act 2025 received assent on 12 March 2025 and commenced in three stages: the police search powers on assent, the possession, sale and supply changes on 1 July 2025, and the retail duties on 1 July 2026. Machetes and swords were added to the prohibited weapons list by an amendment to the regulations that also took effect on 1 July 2025. One provision of the amending Act, section 11, which would add a machete exemption for gardening or camping to Schedule 2, had not commenced when this page was last verified.
Stage one: 12 March 2025
On assent, the amending Act inserted Part 14C into the Summary Offences Act 1953 (SA), a search regime built around metal detector searches, and repealed the former sections 72A to 72C.
Stage two: 1 July 2025
This stage changed what ordinary people can carry and buy.
Section 21D had made it an offence to sell a knife to a minor under 16. From 1 July 2025 it covers any minor, meaning anyone under 18, and the seller’s defence turns on a reasonable belief, induced by false evidence of age given on request, that the buyer was 18 or over. A new section 21DA created two offences of supplying a knife to a minor where the supplier knew, or ought reasonably to have known, that the minor intended or was likely to use it in a serious offence of violence, or in an offence against section 21E. Section 21E and section 21C(7) were extended so education facilities and places of worship sit alongside public places, replacing the former reference to a school. The word “sword” was taken out of the definition of offensive weapon, and an amendment to regulation 6 of the Summary Offences Regulations 2016 (SA) added machetes and swords to the prohibited weapons list on the same day.
Stage three: 1 July 2026
The final stage lands on retailers rather than on the public.
Under section 21DB, a person selling knives from retail premises, including a market stall or a pop-up shop, must display the prescribed prohibition notice at each point of sale or wherever knives are displayed for sale. A seller by direct sales transaction, such as an online order delivered to or collected from an address in South Australia, must publish the prescribed information on the website or give it to the purchaser. Regulation 8AA sets the wording, which says it is unlawful to sell knives to persons under 18, and requires contrasting letters at least 15 millimetres high.
Under section 21DC, prescribed knives stored where the public has access must be kept in a securely locked cabinet or container, securely tethered, or secured in another prescribed manner, so that customers cannot reach them without help from the seller or staff. The duty does not apply while a prospective purchaser inspects a knife. Regulation 8AB prescribes all knives with a sharp cutting edge or a sharp point, other than knives of a kind that may be sold to minors under regulation 8(1), and regulation 8AC exempts fishing tackle shops until it expires in 2028. Both duties carry a maximum of $10,000 with an expiation fee of $1,000.
Why older articles about SA knife law get it wrong
A staged commencement is a trap for anyone researching this online. An article written in April 2025 described the law correctly for April 2025 and is wrong about the position now. One written in August 2025 predates the retail duties that started on 1 July 2026.
The register’s legislative history maps each provision of the amending Act to its date. Part 14C, the repeal of sections 72A to 72C and an amendment to the prohibited weapons search power in section 21L commenced on assent, 12 March 2025. The changes to sections 21A, 21C, 21D and 21E and the new section 21DA commenced on 1 July 2025, fixed by proclamation in the Gazette of 26 June 2025. Sections 21DB and 21DC commenced on 1 July 2026, fixed by proclamation in the Gazette of 4 September 2025. Section 11, the Schedule 2 machete exemption, is listed as uncommenced.
It matters practically. If your alleged offence dates from 2025, which version of the Act applies to it is a question to check rather than assume, because the text moved through three stages between March 2025 and July 2026.
What does the law say about carrying a knife in SA?
Section 21E of the Act reads: a person who, without lawful excuse, has possession of a knife in an education facility, place of worship or public place is guilty of an offence. The maximum is $2,500 or 6 months imprisonment for a first offence, and $5,000 or 12 months for a subsequent offence.
The section says possession, not carrying. A knife in a bag, a car door pocket, or a toolbelt you have not opened all day is still capable of being in your possession.
“Education facility” is defined in section 21A of the Act. It means an early childhood education facility or childcare centre, a preschool or kindergarten, a primary or secondary school, a place at which an approved learning program within the meaning of the Education and Children’s Services Act 2019 (SA) is undertaken, and a university, TAFE SA campus or other tertiary education facility. The definition replaced the former reference to a school on 1 July 2025.
Section 21A also provides that a knife includes a blade, for example a knife blade or a razor blade. A loose blade is enough, and no blade length is specified. Regulation 8AB, which describes knives with a sharp cutting edge or a sharp point, applies to the retail security duty in section 21DC, not to section 21E.
What counts as a lawful excuse for carrying a knife?
Lawful excuse is where most of these cases are won or lost. The words “without lawful excuse” are part of the offence itself, so the question is not simply whether you had a knife in a public place. It is whether there was a lawful reason for that knife to be with you, in that place, at that time.
Neither section 21E nor section 21C lists what counts as a lawful excuse. The nearest statutory guide is the exemption scheme for prohibited weapons in Schedule 2 of the Act, whose clauses deal with business or employment use that is reasonably required, lawful and recognised sport or recreation, religious purposes, entertainment, ceremonies, heirlooms and collections. Schedule 2 applies to section 21F, not to section 21E, but it gives a sense of the purposes the law treats as legitimate.
Whether your reason works is a question about evidence, and three things carry weight.
A real connection between the knife and the lawful use: the trade you work in, the fishing you were doing, the job you had just finished. Whether that reason still held at the time and place police found it, because a knife that lives in a toolbox sits differently at 7am on a job site than at 2am outside a nightclub. And corroboration: rosters, invoices, an employer’s statement, a tackle shop receipt.
That evidence is easy to gather in the first fortnight and painful to reconstruct six months later. Every hour matters. Call (08) 7094 2021, or book a same-day free 30-minute consultation online.
Key points
- “Without lawful excuse” is written into the offence, so the excuse is answered on the evidence, not assumed from a clean record.
- The excuse has to hold at the time and place the knife was found, which is why the same knife is a different case at 7am on site and at 2am outside a venue.
- Corroboration decides it: rosters, invoices, receipts and an employer’s statement, gathered in the first fortnight.
Which weapons are prohibited weapons in SA?
Prohibited weapons are dealt with under section 21F of the Act, and the list sits in regulation 6 of the Summary Offences Regulations 2016 (SA). Dealing in, using or possessing a prohibited weapon carries a maximum of $20,000 or 2 years imprisonment.
Machetes and swords were added to that list on 1 July 2025. Regulation 6 defines a machete as a large knife designed or adapted for use as an agricultural slashing tool or weapon. It defines a sword as a thing designed or adapted for use as a weapon with a long blade and a hilt or handle, or intended to be used with a hilt or handle, which has a sharp point or a cutting edge on one or more sides. Both definitions turn on design and adaptation, so the item’s physical characteristics are something a defence can test.
The rest of the list has been in regulation 6 for longer. The table summarises every item it declares to be a prohibited weapon for Part 3A.
| Prohibited weapon | What regulation 6 covers |
|---|---|
| Ballistic knife | A device, other than a dart projector, designed to fire a knife, dagger or similar instrument by mechanical, percussive or explosive means |
| Bayonet | A stabbing weapon designed to be attached to or at the muzzle of a rifle |
| Brace catapult | A catapult with a brace fitted or resting on the forearm to support the forearm or wrist |
| Butterfly knife | A knife whose handle is in 2 sections that fold over the blade or spike, which can be exposed by gravity or centrifugal force |
| Concealed weapon | An article that appears harmless but conceals a knife, spike or other weapon |
| Cross-bow and pistol cross-bow | Any cross-bow, including one designed to be aimed and fired with one hand |
| Dagger | A sharp, pointed stabbing weapon, other than a bayonet or sword, ordinarily capable of being concealed on the person, with a flat blade sharpened on both sides or a needle-like blade |
| Dirk, sgian dhu and poniard | Ceremonial weapons associated with traditional Scottish culture or with the traditions of a prescribed masonic organisation |
| Extendable baton | A baton designed as a weapon that extends by gravity, centrifugal force, a release button or another device |
| Fighting knife | A knife, other than a bayonet or sword, designed for hand to hand fighting, for example a butterfly knife, dagger, flick-knife, push knife or trench knife |
| Flick-knife | A knife whose blade springs or is released from the handle by a button or other device, or whose sheath withdraws into the handle |
| Hand or foot claw | Prongs or other projections worn on the hands or feet as a weapon |
| Knife belt | A belt or similar article designed to hold a knife, dagger or similar instrument so that it is concealed or disguised when worn |
| Knuckle duster | A device worn across the knuckles to increase the force of a punch or to protect the knuckles, including a weighted or studded glove but not a boxing glove |
| Laser pointer | A hand held laser pointer with an accessible emission level greater than 1 milliwatt |
| Machete | A large knife designed or adapted for use as an agricultural slashing tool or weapon |
| Morning star and nunchakus | A weight attached to a chain, rope or other flexible material, and 2 or more bars joined so that they swing independently |
| Push knife | A blade or spike with a transverse handle, held between the fingers and designed to injure by a punching or pushing movement |
| Star knife and throwing knife | A device of outward points, blades or spikes designed to spin when thrown, and a knife designed to cause serious injury when thrown |
| Sword | A thing designed or adapted for use as a weapon with a long blade and a hilt or handle, which has a sharp point or a cutting edge |
| Trench knife | A blade or spike on a handle held in the closed fist with the fingers through it, so that the handle serves as a knuckle duster |
| Undetectable knife | A knife made of material that prevents detection by a metal detector or X-ray and capable of causing serious injury or death |
| Chemical agents | CN, CS and DM (adamsite), in all their forms |
Prohibited weapons declared by regulation 6 of the Summary Offences Regulations 2016 (SA), summarised from the regulation as in force from 1 July 2026. If your matter concerns one of these items, the full definition needs to be read for that item before anyone tells you where you stand.
Section 21F(2) makes it a defence to prove that the defendant was an exempt person under Schedule 2, or under a declaration by the Minister, in the circumstances of the alleged offence. Clause 4 of Schedule 2 covers a person who has a prohibited weapon for the purpose of delivering it to a police officer as soon as reasonably practicable, which protects a person handing in an item that became prohibited on 1 July 2025. Most of the other exemptions do not apply to a person who has ever been found guilty of an offence involving violence carrying a maximum of 5 years or more (clause 2(2)), and an exemption under a clause is lost for good if the person is found guilty of using the weapon to threaten or injure someone (clause 2(3)).
How an ordinary object becomes a prohibited weapon
The Act creates the offence. The regulations fill in the list. Parliament does not need to pass a new Act to add an item, so something you bought lawfully and kept in the shed for years can become a prohibited weapon without you doing anything. That is what happened to machetes and swords on 1 July 2025.
The same technique appears in firearms law, where regulation 4 of the Firearms Regulations 2017 (SA) declares regulated imitation firearms and gel blasters to be firearms, which is how imitation firearms and gel blasters were pulled into the licensing system.
What is an offensive weapon or a dangerous article?
Section 21C of the Act covers offensive weapons, articles of disguise, housebreaking implements and dangerous articles, with maximums running up to $10,000 or 2 years imprisonment. An offensive weapon includes a rifle, gun, pistol, knife, club, bludgeon, truncheon or other offensive or lethal weapon or instrument, but not a prohibited weapon (section 21A). A knife can therefore be charged under section 21C as well as section 21E, which matters at night around licensed premises and in a confrontation. A person carries a weapon if it is on or about them or under their immediate control (section 21A(2)), and each subsection has its own elements for the prosecution to prove.
Section 21C(7) matters most where a confrontation is alleged. It covers using, or visibly carrying, an offensive weapon in the presence of a person in an education facility, place of worship or public place, in a manner likely to cause a person of reasonable firmness to fear for personal safety. No person of reasonable firmness need actually be, or be likely to be, present (section 21C(8)). If the court is not satisfied of the section 21C(7) offence, it may convict of carrying an offensive weapon under section 21C(1)(a) instead (section 21C(9)). Presence and place are elements, not background: where it happened, and whether a person was there, matter as much as the manner alleged. A weapons charge and a violence charge such as assault causing harm can arise from the same few seconds.
Until 30 June 2025 the definition of offensive weapon named a sword. Since 1 July 2025 a sword is a prohibited weapon under section 21F, which lifts the maximum from $2,500 for carrying it without lawful excuse to $20,000 for possessing it.
What are the penalties for knife and weapons charges in SA?
Maximum penalties for knife offences SA courts deal with under Part 3A run from $1,250 up to $35,000 or 4 years imprisonment, depending on the section charged. Possessing a knife in a public place carries $2,500 or 6 months for a first offence. Possessing a prohibited weapon carries $20,000 or 2 years.
| Offence | Provision | Maximum penalty |
|---|---|---|
| Possess a knife in an education facility, place of worship or public place without lawful excuse, first offence | section 21E | $2,500 or 6 months imprisonment |
| The same offence, subsequent offence | section 21E | $5,000 or 12 months imprisonment |
| Carry an offensive weapon or article of disguise, or possess housebreaking implements, without lawful excuse | section 21C(1) | $2,500 or 6 months imprisonment |
| Deal in, use or possess a dangerous article without lawful excuse | section 21C(2) | $7,500 or 18 months imprisonment |
| Carry an offensive weapon or dangerous article without lawful excuse at night (9 pm to 6 am) while in, or apparently entering or leaving, licensed premises or a carpark provided for their patrons | section 21C(3) | $10,000 or 2 years imprisonment |
| Entitled person using or possessing a dangerous article other than in a safe and secure manner | section 21C(6) | $1,250 or 3 months imprisonment |
| Use or visibly carry an offensive weapon in the presence of a person in an education facility, place of worship or public place, in a manner likely to cause a person of reasonable firmness to fear for personal safety | section 21C(7) | $10,000 or 2 years imprisonment |
| Manufacture, sell, distribute, supply or otherwise deal in, use or possess a prohibited weapon | section 21F(1) | $20,000 or 2 years imprisonment |
| Entitled person using or possessing a prohibited weapon other than in a safe and secure manner | section 21F(14) | $1,250 or 3 months imprisonment |
Maximum penalties for knife offences and other carrying and possession offences under Part 3A of the Summary Offences Act 1953 (SA). Current to the Act as in force from 1 July 2026.
| Offence | Provision | Maximum penalty |
|---|---|---|
| Sell a knife to a person under 18 | section 21D(1) | $20,000 or 2 years imprisonment |
| Make a false statement or produce false evidence in response to a seller's request for evidence of age | section 21D(3) | $1,250 |
| Market a knife in a way that indicates or suggests it is suitable for combat, or that is otherwise likely to stimulate or encourage violent behaviour involving its use as a weapon | section 21D(4) | $20,000 or 2 years imprisonment |
| Supply a knife to a minor knowing, or where you ought reasonably to have known, that the minor intended or was likely to use it in a serious offence of violence | section 21DA(1) | $35,000 or 4 years imprisonment |
| Supply a knife to a minor knowing, or where you ought reasonably to have known, that the minor intended or was likely to use it in an offence against section 21E | section 21DA(2) | $10,000 or 6 months imprisonment |
| Sell knives from retail premises without the prescribed notices displayed, or by direct sales transaction without the prescribed information, from 1 July 2026 | section 21DB(1), (4) | $10,000, expiation fee $1,000 |
| Prescribed knives not kept secured where the public has access in retail premises, from 1 July 2026 | section 21DC(1) | $10,000, expiation fee $1,000 |
Maximum penalties for selling, supplying and retail duties under Part 3A. Current to the Act as in force from 1 July 2026.
These are ceilings, not starting points.
When can police search you for a knife in SA?
Since 12 March 2025, Part 14C of the Act has given police a search regime aimed at detecting knife offences and other weapons offences. It has four limbs, and which limb police relied on is worth asking early.
- Serious violence areas (section 66Y). A police officer of or above the rank of Superintendent may authorise searches in a specified area for up to 24 hours, on reasonable grounds to believe that an incident of serious violence involving a group or groups of people may take place there and that the powers are reasonably necessary to prevent it. Anyone in, entering or leaving the area can be searched, and the search need not be by metal detector.
- Public places (section 66Z). The Commissioner may authorise searches in a specified public place for up to 6 hours, on reasonable grounds to believe that an incident of violence or disorder may take place and that the powers are reasonably necessary to prevent it. A public place includes a place of worship.
- Certain persons (section 66ZA). A person found guilty of a prescribed offence within the previous 5 years, or who was a member of a criminal organisation within that time, can be searched in a public place.
- Events and places (section 66ZB). Licensed premises, declared places of worship, public places holding a declared public event, declared shopping precincts, declared public transport hubs and vehicles on a declared public transport service, together with carparks provided for them. The power does not reach a person’s home or a hotel room.
Under sections 66Z, 66ZA and 66ZB the search must start as a metal detector search. If the detector indicates metal, police can require the person to produce the item, and can search further if it is not produced. Before a section 66ZA search, police must give the grounds and explain the obstruction offence, although a failure to do so does not by itself make the search invalid.
At a place covered by section 66ZB, an officer may also order a person to leave, by written notice served personally, where the officer believes or apprehends on reasonable grounds that the person’s presence poses a risk to public order and safety, or that an offence of a kind that may pose that risk has been or is about to be committed. Staying, or returning within 24 hours, carries a maximum of $1,250 (section 66ZI). Hindering or obstructing a search, or refusing to comply with a requirement or direction under Part 14C, carries $2,500 or 6 months imprisonment (section 66ZJ(6)).
The former sections 72A to 72C were repealed when Part 14C came in, so anything written about those sections before March 2025 describes provisions no longer in the Act.
Whether the power relied on was available, and whether its conditions were met, is a line of enquiry for later, not for the footpath. Comply, note what was said, and raise it with a lawyer.
How similar charges tend to play out
Three illustrations of how the knife offences SA police charge can play out on ordinary facts. They are not predictions. Outcome depends on the section, the item, the place, the excuse and the evidence for it.
The work knife. A tradesperson is stopped for a traffic matter at 7am and a box cutter is in the door pocket of the ute. A knife includes a blade, so the charge is section 21E, maximum $2,500 or 6 months. The excuse is the trade, and the evidence is the roster for that morning, the invoice for the job, and the employer’s statement. On that material the charge is answered on lawful excuse, and if it proceeds to a plea the question becomes whether a conviction is recorded.
The machete in the boot. A machete bought for clearing scrub in 2023 is found in a car boot during a Part 14C search in the carpark of a declared transport hub in 2026. It has been a prohibited weapon since 1 July 2025, and the charge is section 21F(1), maximum $20,000 or 2 years. The gardening and camping exemption in the amending Act has not commenced, so the defence looks first at whether the item meets the regulation 6 definition, a large knife designed or adapted for use as an agricultural slashing tool or weapon, and then at the Schedule 2 exemptions in force, such as use reasonably required in a business or employment (clause 6). An exemption is a defence the defendant must prove (section 21F(2)). The receipt, the property it is used on and the last time it was used are the evidence.
The sword on the wall. A decorative sword bought a decade ago is found during an unrelated search of a house. Since 1 July 2025 it has been a prohibited weapon rather than an offensive weapon, so possession can be charged under section 21F(1), maximum $20,000 or 2 years, and the offence has no lawful excuse element. The case is whether the thing is designed or adapted for use as a weapon, with a sharp point or cutting edge, within regulation 6, and whether a Schedule 2 exemption reaches it. The heirloom clause covers a weapon of sentimental value previously held by a relative and kept in a safe and secure manner at home (clause 13). The collector clause needs a themed or historical collection of at least 3 weapons and a bound record book (clause 14). A plea entered before those questions are asked gives them away.
What if you had the knife for work, fishing or camping?
You do not need to be a criminal to be charged under Part 3A. The section asks about possession, place and lawful excuse. It does not ask whether you have ever been in trouble, and an ordinary reason is not by itself an answer to the charge.
Three situations come up constantly. The tradesperson, whose box cutter lives in the ute because that is where work tools live, stopped for something unrelated. Nobody suggests it was going to be used on a person, but the offence does not require that.
The fisher, the camper and the hunter, with the tackle box still in the boot from a trip three weekends ago. A blade bought for gutting fish is still a knife in a public place, and a machete bought for clearing scrub is now a prohibited weapon unless an exemption applies.
And the person who forgot, which is the most common and the hardest to explain. “I forgot it was there” explains how the knife came to be with you. It does not explain why you needed it there. That distinction is why advice is worth getting before you talk at the roadside.
Do not assume a friendly explanation will end the matter. What you say becomes evidence on the very question in issue.
Will a knife charge mean a criminal record?
For many people the fine is not the real worry. The worry is whether a conviction is recorded, because a recorded conviction is what appears on a police check, and what an employer, a licensing body or a visa officer will see when they run one.
That is a separate question from guilt, decided at sentencing rather than in the charge. Our guide on avoiding a conviction being recorded covers it. It is one reason a plea in a weapons matter deserves preparation.
How we defend knife and prohibited weapons charges
Weapons charges in Adelaide reward early, specific work. Evidence of a lawful excuse is easiest to secure in the first few weeks, while receipts, rosters and messages still exist. These are the questions we work through on every weapons matter.
- Which section is actually charged, because the maximums across Part 3A run from $1,250 to $35,000.
- Whether the item meets the definition alleged, which for a machete or a sword turns on design and adaptation.
- Whether the place is caught, since section 21E has three limbs and not every location answers one.
- Whether there is a lawful excuse, and what evidence proves it.
- For a prohibited weapon, whether a Schedule 2 exemption or a Ministerial declaration applies, which the defence must prove.
- How the item was found, and whether the search power relied on was properly engaged.
- Which version of the Act applies, given three commencement dates inside sixteen months.
This page sits within our guide to firearms and weapons offences in South Australia, alongside our page on possessing a firearm without a licence. If your matter is listed in the city we appear at the Adelaide Magistrates Court.
This page states the law as at October 2026 and reflects the Summary Offences Act 1953 (SA) and the Summary Offences Regulations 2016 (SA) as in force from 1 July 2026. It is general information about South Australian law, not advice about your matter. Last verified on 23 October 2026.
Free Consultation. You can talk this through with a lawyer before you say anything further to police. Book a same-day free 30-minute consultation, or call (08) 7094 2021.
Frequently asked questions
Is it illegal to carry a knife in South Australia?
It is an offence to have possession of a knife in a public place, an education facility or a place of worship without lawful excuse, under section 21E of the Summary Offences Act 1953 (SA). The maximum for a first offence is $2,500 or 6 months imprisonment.
What is the penalty for carrying a knife in a public place in SA?
The maximum under section 21E is $2,500 or 6 months imprisonment for a first offence, and $5,000 or 12 months for a subsequent offence. Those are the ceilings the Act sets, not starting points. What a court imposes depends on the facts.
Can I carry a pocket knife or a multi-tool in SA?
There is no blanket exception for small knives. Section 21E turns on possession in a public place, an education facility or a place of worship without lawful excuse, not on blade length. A work or recreational reason may amount to a lawful excuse, assessed on your evidence.
Are machetes illegal in South Australia?
Yes, unless an exemption applies. Machetes became prohibited weapons on 1 July 2025 under regulation 6 of the Summary Offences Regulations 2016 (SA). Dealing in, using or possessing one carries a maximum of $20,000 or 2 years imprisonment under section 21F(1). An exemption for gardening or camping is in the amending Act but had not commenced as at 23 October 2026, so the exemptions in force in Schedule 2, such as use reasonably required in a business or employment (clause 6), are the ones that count.
Is a knuckle duster a prohibited weapon in SA?
Yes. Regulation 6 of the Summary Offences Regulations 2016 (SA) declares a knuckle duster to be a prohibited weapon: a device designed to be worn across the knuckles to increase the force of a punch or to protect the knuckles, including a weighted or studded glove but not a boxing glove. Dealing in, using or possessing one carries a maximum of $20,000 or 2 years imprisonment under section 21F(1).
Can police search me for a knife without a warrant?
Yes, in the places and circumstances set by Part 14C of the Summary Offences Act 1953 (SA), in force since 12 March 2025. They include areas a Superintendent has authorised because of a risk of serious violence (section 66Y), public places the Commissioner has authorised (section 66Z), people found guilty of a prescribed offence within the last 5 years (section 66ZA), and licensed premises and declared places of worship, events, shopping precincts and transport hubs (section 66ZB).
What happens if I am caught with a knife at a school?
Education facilities were brought into sections 21C and 21E on 1 July 2025, and section 21A defines an education facility broadly, from childcare through to tertiary institutions. Possessing a knife there without lawful excuse carries the same maximum as a public place: $2,500 or 6 months imprisonment for a first offence.
Did South Australia's knife laws change in 2026?
Yes. The Summary Offences (Knives and Other Weapons) Amendment Act 2025 commenced in three stages: 12 March 2025 for the search powers, 1 July 2025 for the possession, sale and supply changes, and 1 July 2026 for retail display notices and secure storage of knives in shops. Its machete exemption for gardening or camping has not commenced.
Do I need a lawyer for a knife charge in Adelaide?
It is worth getting advice on any of the knife offences SA police charge, and on any prohibited weapon charge. The result usually turns on questions most people cannot assess alone: which section is charged, whether the item meets the definition alleged, whether the place is caught, and what evidence supports a lawful excuse. Call (08) 7094 2021.
South Australian courts we attend for weapons matters
Courts we attend
Book a same-day free 30-minute consultation or call (08) 7094 2021.