A person who—
(a) knowing that the person intends to commit treason, does not report such information with all reasonable despatch to a magistrate, justice of the peace or a police officer, or use other reasonable means to prevent the commission of the offence; or
(b) knowing or believing that the person has committed the offence of treason, does any act with intent to obstruct or prevent his or her arrest or prosecution for that offence,
commits an offence and is liable on conviction on indictment to imprisonment for 7 years.