Terrorism Overview Criminal Code, s. 83.18 Indictable

Participation in Activity of a Terrorist Group

If you knowingly participate in or contribute to any activity of a terrorist group to carry out an act of terrorism, you can face charges.

Last reviewed: July 2026 Section: Criminal Code, s. 83.18 Classification: Indictable
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Plain-Language Summary

Participation in Activity of a Terrorist Group: What the Charge Means

Participating in a terrorist group's activity means knowingly taking part in what the group does. This can be direct or indirect help. The goal must be to support terrorist activity. It is an indictable offence. The longest sentence is 10 years, served on top of any other sentence for the same event. There is no minimum sentence.

Participation in a Terrorist Group: There are almost 80 terrorist entitiesGroups facilitating or carrying out of terrorist activities (Public Safety Canada - Currently listed entities) listed under the Criminal CodeA federal act codifying most criminal offences in Canada. These entities can include a person, group, trust, partnership or fund or an unincorporated association or organization. Once an entity is listed, it considered to be a "terrorist group," according to a Department of Justice (DoJ) statement (Government of Canada lists four new terrorist entities,) explaining that the listing of terrorist entities sends "a strong message that Canada will not tolerate this type of activity, and will do everything in its power to counter the ongoing threat to Canada's national security and its citizens." According to s.83.18 (1) of the Code, if you knowingly participate in or contribute to any activity of a terrorist group you could be liable to imprisonment for up to 10 years. You can be charged even if no terrorist activity takes place or if you did not actually enhance the group's ability to carry out the offenceA criminal activity.

What is Participation in Activity of a Terrorist Group?

Canada amended the Criminal Code, the Official Secrets Act, the Canada Evidence Act, the Proceeds of Crime Act and a number of other acts, passing the Anti-terrorismAn offence aimed at intimidating the public Act (ATA) following the 9/11 terrorist attacks in 2001. The Code defines terrorism as an effort committed "in whole or in part for a political, religious or ideological purpose, objective or cause" with the intention of intimidating the public. According to the Code, terrorism includes an act that: causes death or serious bodily harm to a person by the use of violence; endangers a person's life; causes a serious risk to the health or safety of the public or any segment of the public; causes substantial property damage, whether to public or private property; or causes serious interference with or serious disruption of an essential service, facility or system, whether public or private. The Government of Canada states that acts of terrorism threaten Canada's political institutions along with the stability of the economy and the welfare of the nation. Enacted in December 2001, the ATA has four objectives: to prevent terrorists from getting into Canada and protect Canadians from terrorist acts; to activate tools to identify, prosecute, convict and punish terrorists; to keep the Canada-U.S. border secure and a contributor to economic security; and to work with the international community to bring terrorists to justice and address the root causes of violence. Terrorism offences are covered in PART II.1 of Offences Against Public Order and include a number of crimes such as participation in the activity of terrorist group, dealt with by s.83.18(1). If you knowingly participate in or contribute to any activity of a terrorist group for the purpose of enhancing the ability of that group to facilitate or carry out an act of terrorism, you can face charges. Your activity can be direct or indirect and it does not matter if the terrorist activity is carried out. You also do not have to know the specific nature of the terrorist activity. Participating in the activities of a terrorist group includes: providing, receiving or recruiting a person to receive training; providing or offering to provide a skill or an expertise for the benefit of, at the direction of or in association with a terrorist group; recruiting a person in order to facilitate or commit a terrorism offence, or an act or omission outside Canada that, if committed in Canada, would be a terrorism offence; entering or remaining in any country for the benefit of, at the direction of or in association with a terrorist group; or making yourself available, in response to instructions from any of the persons who constitute a terrorist group, to facilitate or commit a terrorism offence, or an act or omission outside Canada that, if committed in Canada, would be a terrorism offence.

What is Needed to Convict

To win a conviction, the Crown must prove two things: that you knowingly participated in or contributed to the activity of a terrorist group, and that you did so for the purpose of enhancing that group's ability to facilitate or carry out a terrorist activity.

The Crown does not need to prove that you personally held a political, religious or ideological belief or motive. The political, religious or ideological purpose element is part of the legal definition of 'terrorist activity' itself; it helps determine whether the group qualifies as a terrorist group under the Criminal Code. It is not a separate requirement that you personally share that purpose.

The Criminal Code also makes clear that you can be convicted even if the terrorist group never actually carried out any activity, even if your participation did not in fact increase the group's capabilities, and even if you did not know the specific nature of any terrorist activity the group was planning.

In determining whether you participated in the activity of a terrorist group, the court may consider a number of factors, including whether you:

  • used a name, word, symbol or other representation that identifies, or is associated with, the terrorist group
  • frequently associated with any of the persons who constitute the terrorist group
  • received any benefit from the terrorist group; or
  • repeatedly engaged in activities at the instruction of any of the persons who constitute the terrorist group.

These are contextual factors the court may weigh; they are not elements the Crown must independently prove, and no single factor is determinative.

Treated as an Indictable Offence

If you have been charged with participation in the activity of a terrorist group the prosecutor will proceed as an indictable offenceA more serious type of Canadian criminal offence.. Indictable offences are reserved for serious crimes, such as murder, and include severe prison sentences upon conviction.

Penalty for Participation in Activity of a Terrorist Group

If you are convicted of participation in the activity of a terrorist group, you could be sent to prison for up to 10 years. That is not the only penalty. According to the Department of Justice, once an entity, including an individual, is listed and considered to be a "terrorist group" that property may be the subject of seizure, restraint or forfeiture. A listed entity cannot be removed from the list until the Minister of Public Safety decides there are reasonable grounds to recommend removal or until a judge finds that the listing is no longer reasonable. Under s.83.26 of the Criminal Code, a sentence for this offence is normally served consecutively to other sentences, unless a life sentence is involved.

What the Crown Must Prove

To get a conviction, the Crown must prove every part of the offence beyond a reasonable doubt.

Section

1

Participation or contribution

The accused participated in or contributed to, directly or indirectly, an activity of a terrorist group. Under s.83.18(3), this includes (non-exhaustively): providing/receiving/recruiting for training; providing or offering a skill or expertise for the benefit of, at the direction of, or in association with a terrorist group; recruiting a person to facilitate or commit a terrorism offence; entering or remaining in a country for the benefit of, at the direction of, or in association with a terrorist group; or making oneself available, on instruction from the group, to facilitate or commit a terrorism offence.

2

A terrorist group was involved

The activity participated in or contributed to was an activity of a "terrorist group" as defined in the Criminal Code (s.83.01) — this includes both listed entities and unlisted groups meeting the statutory definition.

3

Knowledge

The accused acted knowingly — i.e., knew that they were participating in or contributing to an activity of a terrorist group. Under s.83.18(2)(c), the Crown does NOT need to prove the accused knew the specific nature of any terrorist activity the group might facilitate or carry out — general knowledge that the group is a terrorist group engaging in the relevant activity suffices.

4

Purpose — enhancing the group's ability to facilitate or carry out terrorist activity

The participation or contribution was for the purpose of enhancing the ability of the terrorist group to facilitate or carry out a terrorist activity. This is a subjective purpose requirement distinct from the knowledge element.

Proof rule

No requirement that the group actually acted, or that the contribution actually helped

Under s.83.18(2), the offence is complete whether or not the terrorist group actually facilitated or carried out a terrorist activity, and whether or not the accused's participation or contribution actually enhanced the group's ability to do so. The Crown need only prove the purpose and the qualifying conduct, not a causal real-world effect.

6

Non-exhaustive factors relevant to proving participation

Under s.83.18(4), the court may consider factors including whether the accused used a name/word/symbol/representation identifying with the group; frequently associated with persons who constitute the group; received a benefit from the group; or repeatedly engaged in activities on the group's instruction. These are evidentiary factors, not separate elements the Crown must independently prove.

A proof rule (a presumption) is a rule about evidence. It does not mean the person is automatically guilty. It means the court may treat one fact as evidence of another fact unless there is evidence pointing the other way.

Possible Penalties

These are maximum sentences. Actual sentences depend on the facts, criminal history, and any mitigating or aggravating circumstances.

Knowingly participating in or contributing to any activity of a terrorist group to enhance its ability to facilitate or carry out terrorist activity — s. 83.18

Indictable
Maximum penalty
10 years
How it proceeds
Indictable only

No mandatory minimum applies.

What these words mean
Indictable
The more serious way to prosecute an offence. It can carry higher maximum penalties.
Summary conviction
The less serious, usually faster way to prosecute an offence, with lower maximum penalties.
Hybrid
An offence the Crown can prosecute either way — by indictment or by summary conviction.
Summary only
Summary-only offences are prosecuted by summary conviction. The Criminal Code sets the maximum penalty in the specific offence section.
Crown election
The Crown prosecutor’s choice of which way to proceed on a hybrid offence.

Possible Defences and Legal Issues

Participation in Activity of a Terrorist Group — s.83.18

Section 83.18 does not list a special defence in the Criminal Code. The Crown must prove that the accused knowingly took part in or contributed to an activity of a terrorist group, and did so for the purpose of enhancing that group's ability to facilitate or carry out terrorist activity. An offence can still be made out even if the terrorist group never actually facilitated or carried out a terrorist activity, even if the accused's participation did not actually enhance the group's ability, and even if the accused did not know the specific nature of any terrorist activity the group might carry out — that describes how far the offence reaches, not a defence.

Possible issues may still depend on the facts, the evidence, and whether the Crown can prove each part of the offence, including whether the group and the activity meet the Criminal Code definitions. This is general legal information, not legal advice.

Application / Scope

Limits on “terrorist activity” and “terrorist group” — s. 83.01

Section 83.18 depends on the definitions of “terrorist group” and “terrorist activity” in section 83.01, and “terrorist activity” has built-in limits. It "does not include an act or omission that is committed during an armed conflict and that, at the time and in the place of its commission, is in accordance with customary international law or conventional international law applicable to the conflict", or certain activities of a state's armed forces carried out under other rules of international law. For conduct said to disrupt an essential service, the definition also excludes anything happening "other than as a result of advocacy, protest, dissent or stoppage of work that is not intended to result in the conduct or harm referred to in any of clauses (A) to (C)" — in plain terms, lawful protest, advocacy, dissent, or a work stoppage is not terrorist activity unless it is meant to cause death, serious bodily harm, danger to life, or a serious risk to public health or safety.

Section 83.01(1.1) adds that "the expression of a political, religious or ideological thought, belief or opinion does not come within paragraph (b) of the definition terrorist activity in subsection (1) unless it constitutes an act or omission that satisfies the criteria of that paragraph" — simply holding or voicing a political, religious, or ideological view is not, by itself, terrorist activity or participation in a terrorist group.

If the group or activity behind a participation charge falls within one of these limits, it does not meet the legal definitions that section 83.18 depends on. The Crown still has to prove every other part of the offence.

Common Legal Terms

Terms marked with a dotted underline in the article above are defined here and available in the full site glossary.

Indictable offence
Glossary entry →

An indictable offence is generally a more serious type of Canadian criminal offence. Some indictable matters have higher maximum penalties and may involve different court procedures, including election about the mode of trial in some cases.

Terrorism
Glossary entry →

An offence motivated by “a political, religious or ideological purpose, objective or cause" with the intention of intimidating the public. Activities within this context include the use of violence, endangering the health and safety of the public and interference with essential services, facilities or systems.

Legal sources

The official statute section(s) this page is based on. Always confirm against the official source before relying on it.

  • Criminal Code s. 83.18 Participation in activity of terrorist group
    Source current to: 2026-05-26
    View official source ↗
  • Criminal Code s. 83.26 Consecutive sentences for terrorism offences
    Source current to: 2026-05-26
    View official source ↗

Government References

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