Artikel 19

The competent authority, in giving the permission referred to in Article 15, 16 or 17, or in granting the application referred to in Article 18, may lay down such conditions as it deems fit, inter alia, as to the time and place of the taking of the evidence. Similarly it may require that it be given reasonable advance notice of the time, date and place of the taking of the evidence; in such a case a representative of the authority shall be entitled to be present at the taking of the evidence.