Artikel 15

In a civil or commercial matter, a diplomatic officer or consular agent of a Contracting State may, in the territory of another Contracting State and within the area where he exercises his functions, take the evidence without compulsion of nationals of a State which he represents in aid of proceedings commenced in the courts of a State which he represents.
A Contracting State may declare that evidence may be taken by a diplomatic officer or consular agent only if permission to that effect is given upon application made by him or on his behalf to the appropriate authority designated by the declaring State.