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Restriction of disclosure of existence of authorisations and of matter intercepted.
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12.—(1) The Minister shall ensure that such arrangements as he considers necessary exist—
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(a) to limit to the minimum necessary the disclosure of—
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(i) the fact that an authorisation has been given, and
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(ii) the contents of any communication which has been intercepted pursuant to an authorisation,
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and
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(b) to secure that copies of any such communication—
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(i) are not made to any extent greater than is necessary, and
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(ii) are destroyed as soon as their retention is no longer necessary.
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(2) In paragraphs (a) and (b) of subsection (1) of this section “necessary” means necessary for the purpose of the prevention or detection of serious offences or in the interests of the security of the State.
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