17.—(1) Where—
(a)an application is made under article 3(6), 12(8), 13(5) or 16(2),
(b)a person claiming to have an interest in the material applies to be heard by the judicial officer, and
(c)he shows that he was involved (whether alone or with others and whether directly or indirectly) in the prosecutor’s attention being brought to the material,
the judicial officer must not make an order under article 3(6), 12(8), 13(5) or 16(2) (as the case may be) unless the person applying under paragraph (b) has been given an opportunity to be heard.