After an interval of six months from the signature of the present treaty, commissioners designated by the High Contracting Parties will go to delineate the frontier between China and Tonkin. They will place, wherever there is need, boundary markers designed to clearly delineate the line of demarcation. In the case where they can not agree among themselves on the placement of the markers or on the rectifications of detail in the actual frontier of Tonkin which it may be necessary to make in the common interest of both parties, they will refer it to their respective governments.
