Law Enforcement (Powers and Responsibilities) Act 2002

An authorisation has effect, unless sooner revoked, during the period beginning at the time it is given and ending at the time specified in the authorisation.

The period that an authorisation relating to any area or road has effect must not exceed the period that the police officer giving the authorisation considers reasonably necessary for the purpose for which it is given, but must not in any case exceed 48 hours.

The period that the authorisation has effect may be extended by the giving of a further authorisation, but only if—

the total period of the authorisation in relation to the area or road does not exceed 48 hours, or

the Supreme Court, on the application of the police officer proposing to give the further authorisation, determines that the police officer is entitled to give the further authorisation.

The Commissioner of Police or a Deputy or Assistant Commissioner of Police may revoke an authorisation at any time, and must revoke it if directed to do so by order of the Supreme Court.

The cessation of an authorisation (by revocation or otherwise) does not affect anything lawfully done in reliance on the authorisation before it ceased to have effect.