If in any prosecution against any person for an offence under section 3 it is proved that he is an agent or that he is or has been or is reasonably suspected of being or having been directly or indirectly used by or on behalf of any foreign or international body or institution or that he has entered or is within the Republic in contravention of any law and that he has prepared, compiled, made, obtained or received any document, model, article or information other than that referred to in section 3(a) , or any document, model, article or information relating to a place, article or matter other than that referred to in section 3(b)(i) or (ii), it shall, unless the contrary is proved, be presumed that such document, model, article or information may directly or indirectly be of use to a foreign State or a hostile organization.