Prevention of Terrorism (Temporary Provisions) Act 1989

1(1)An exclusion order may be revoked at any time by a further order made by the Secretary of State.

(2)An exclusion order shall, unless revoked earlier, expire at the end of the period of three years beginning with the day on which it is made.

(3)The fact that an exclusion order against a person has been revoked or has expired shall not prevent the making of a further exclusion order against him.