9. Duty to inform person detained of grounds of detention, etc.

Whenever any person is detained under any order made under section 8(1)(a) he shall, in accordance with Article 151 of the Constitution, as soon as possible —

be informed of the grounds of his detention;

subject to clause (3) of that Article (which provides that no authority may be required to disclose facts whose disclosure would in its opinion be against the national interest) be informed of the allegations of fact on which the order is based; and

be given the opportunity of making representations against the order as soon as possible.