The Contracting Parties may, through mutual arrangement, amend this Protocol at any time in writing. Such amendment shall enter into force on the first day of the second month after the Contracting Parties have notitied1)[Red: Noot redactie Tractatenblad: kennelijk wordt hier „notified” bedoeld.] each other in writing through diplomatic channels that the constitutional or internal requirements for the entry into force of the amendments have been complied with.
