57.—(1) Without prejudice to any other powers to prohibit or restrict entry to detention centres, and to his powers under rule 28, the Secretary of State may, with a view to ensuring safety and security or the prevention of crime or in the interests of any persons, impose prohibitions on visits by a person to a detention centre or to a detained person in a detention centre for such periods of time as he considers necessary.
(2) Paragraph (1) shall not apply in relation to any visits to a detention centre or detained person by a member of the visiting committee of the detention centre, or to prevent any visit by a legal adviser for the purposes of an interview under rule 30.