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11. Treason and offences against the State

The Treason and State Offences Act 1963

Posted By lanbuk.com

In simple terms

Two years after independence Sierra Leone replaced the inherited English law of treason with its own statute, the Treason and State Offences Act 1963. Its leading interpretation comes from the case that followed the 1967 military takeover.

The 1963 Act

Treason (s.3): Preparing or endeavouring to overthrow the Government by unlawful means; preparing or endeavouring to carry out by force an enterprise which usurps the executive power of the State; inciting or assisting an armed invasion; and assisting an enemy in time of war.

Treason felony (s.4): Lesser acts such as preparing or endeavouring to procure an alteration of the law by unlawful means.

Inchoate treason: Attempts, soliciting and incitement are covered.

Attorney-General's consent: Section 1(2) requires the Attorney-General's consent before a prosecution is instituted.

Lansana and Eleven Others v Reginam

Separate offences: "Prepares" and "endeavours" in s.3(1)(a) create two separate offences, so a count charging both is bad for duplicity.

Consent: Consent is a condition ; without valid consent, given with knowledge of the facts and before the matter first comes before a magistrate, the proceedings are a nullity.

Conspiracy as an overt act: A conspiracy to do the forbidden acts is an overt act of "preparing" under ss.3 and 4.

Later cases: Lansana was applied in Juxon-Smith v The State and in the treason trials of State v Jemilah Bangura and State v Mohamed Forna and Fourteen Others.

Sedition

Akin to treason: Sedition was sometimes described as akin to treason, but Sierra Leone repealed seditious in 2020.

Current law note

Penalty: Treason now carries life imprisonment, not death.

Memory map

Treason and offences against the State

The 1963 Act

  • Treason (s.3)
  • Treason felony (s.4)
  • Inchoate treason
  • Attorney-General's consent

Lansana and Eleven Others…

  • Separate offences
  • Consent
  • Conspiracy as an overt act
  • Later cases

Sedition

  • Akin to treason

Key points

  • The Treason and State Offences Act 1963 is a…
  • Preparing and endeavouring are separate offences
  • Without valid Attorney-General consent the…
  • Treason now carries life imprisonment

Cases

  • Lansana and Eleven Others v…

Key terms

  • Defamation
  • Libel

Take-home points

  • The Treason and State Offences Act 1963 is a Sierra Leone code on treason.
  • Preparing and endeavouring are separate offences: Lansana.
  • Without valid Attorney-General consent the prosecution is a nullity: Lansana.
  • Treason now carries life imprisonment.

Cases in this topic

Related case law

Full judgments on Lanbuk on the same areas of law.

See also

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Other law notes by subject

For study only. By lanbuk.com. Always check current sources and consult a qualified professional.

Cite this page

'Treason and offences against the State, Lanbuk on the Law of Crimes in Sierra Leone' (Lanbuk) <https://www.lanbuk.com/llb/criminal-law-of-sierra-leone/offences-against-the-state> accessed 31 October 2026

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