Some treaties grant the President the authority to fill in the gaps with executive agreements, rather than additional treaties or protocols.
Subsequently, at the initiative of the Soviet Union, additional non-aggression treaties were concluded with all three Baltic States:
At the same time, an additional treaty was offered, modifying the terms of the Treaty of Medina del Campo, upon which Henry's assent was conditioned.
In 1871 Congress added a rider to the Indian Appropriations Act to end the United States' recognizing additional Indian tribes or nations, and prohibiting additional treaties.
The state of New York made additional treaties.
He and other Cree leaders refused to sign any additional treaties unless the Crown guaranteed the autonomy of the Cree people and grant them a united territory.
An additional treaty was signed in 1846.
He participated in the negotiation of additional treaties with Algiers, Tunis, and Tripoli.
Over the next 4 years, additional treaties were completed with the other Potawatomi to completely eliminate their titles from lands in Indiana.
Secondly, it should send a strong signal to the candidate states, inviting them to join the Union immediately, without any additional treaty, by acceding to the intergovernmental part of the existing treaties.