Finlandia and Octavia are two nations located on opposite sides of the Wackavian sea. Both countries have powerful navies and have been at odds with one another for several decades after the discovery of a large underwater oil deposit right in the middle of the Wackavian sea. Tensions have recently escalated, and naval vessels from both countries are on the verge of battle. Sensing that things could soon spiral out of control, the presidents of Finlandia and Octavia held a telephone conversation during which both parties agreed that they would pull out all of their ships (civilian and military) from the disputed area in the Wackavian sea within seven days in order to de-escalate the situation. After seven days, all Finlandian ship left the area, However, several military and ships carrying the Octavian flag remained in the area and began construction of an artificial reef upon which it appeared the nation intended to build a military base.

in this situation, Assuming that the presidents of Finlandia and Octavia had full capacity to represent their states and to negotiate with each other under their respective systems of government, and further assuming that both leaders publicly admitted to having the telephone conversation, is the verbal agreement via telephone binding under the 1969 Vienna Convention on the Law on Treaties?