1. Each Contracting State shall appoint one or more authorised assay offices for the control and marking of articles of precious metals as provided for in Annex II.
2. The authorised assay offices shall satisfy the following conditions:
3. Each Contracting State shall notify the depositary of the appointment of such assay offices and of their marks and any withdrawal of this authorisation from any assay office previously appointed. The depositary shall immediately notify all other Contracting States accordingly.