a) provide the information that the said ASEAN Member State has completed its internal/domestic requirements for the entry into force of the Protocol 6;
b) notify the ASEAN Secretariat on the absence of the duly designated border station, for the purpose of Protocol 6, due to the non-existence of railway linkage and/or facilities for the movement of goods in transit with its neighbour(s), as well as the non-carriage of goods on railway; and
c) be signed by the head of state or head of government or foreign minister or other designated officials who have the full powers to sign such letter.