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78 This Treaty shall remain in force for twenty years from the date of signature. If, however, neither of the High Contracting Parties gives notice twelve months before the expiration of the period of twenty years that it wishes the validity of this Treaty to cease, its validity shall in such case be prolonged for a further five years until such time as either High Contracting Party gives notice in writing twelve months before the expiration of the current five-year period of its intention to terminate its validity.

In faith whereof the plenipotentiaries have signed the present Treaty and attached their seals thereto.

Done in duplicate in Czech and Serbo-Croat. Both texts are equally authentic.

Done in Belgrade the 9th day of May, 1946.