Immigration Act 1971

2 (1) Where a recommendation for deportation made by a court is in force in respect of any person, and that person is neither detained in pursuance of the sentence or order of any court nor for the time being released on bail by any court having power so to release him, he shall, unless the court by which the recommendation is made otherwise directs, be detained pending the making of a deportation order in pursuance of the recommendation, unless the Secretary of State directs him to be released pending further consideration of his case.

(2) Where notice has been given to a person in accordance with regulations under section 18 of this Act of a decision to make a deportation order against him, and he is neither detained in pursuance of the sentence or order of a court nor for the time being released on bail by a court having power so to release him, he may be detained under the authority of the Secretary of State pending the making of the deportation order.

(3) Where a deportation order is in force against any person, he may be detained under the authority of the Secretary of State pending his removal or departure from the United Kingdom (and if already detained by virtue of sub-paragraph (1) or (2) above when the order is made, shall continue to be detained unless the Secretary of State directs otherwise).

(4) In relation to detention under sub-paragraph (2) or (3) above, paragraphs 17 and 18 of Schedule 2 to this Act shall apply as they apply in relation to detention under paragraph 16 of that Schedule.

(5) A person liable to be detained under sub-paragraph (2) or (3) above shall, while not so detained, be subject to such restrictions as to residence and as to reporting to the police as may from time to time be notified to him in writing by the Secretary of State.