Prior to 1871, the U.S. government regularly entered into treaties with Native Americans, but the Indian Appropriations Act of March 3, 1871 (chap. 120, 16 Stat. 563) had attached a horseman (25 U.S.C. § 71) who effectively terminated the president`s drafting of the treaty by providing that no Indian nation or tribe could be recognized as an independent nation. Tribe or power with whom the United States may contractually enter into contracts. The federal government maintained similar contractual relations with Indian tribes after 1871 through implementing agreements, laws, and regulations.  In international law and relations, a protocol is generally an international treaty or agreement that complements a previous treaty or international agreement. A protocol can modify the previous contract or add additional terms. The Contracting Parties to the previous Agreement are not obliged to accept the Protocol. Sometimes this is made clearer by calling it an “optional protocol,” especially when many parties to the first agreement do not support the protocol. The end of the preamble and the beginning of the agreement itself are often indicated by the words “have agreed as follows”.
If a State restricts its contractual obligations by means of reservations, other States Parties have the possibility to accept, oppose or oppose them and to oppose them. If the State accepts them (or does not act at all), the reserving State and the accepting State are released from the reserved legal obligation with regard to their legal obligations to each other (acceptance of the reservation does not alter the legal obligations of the accepting State towards the other Contracting Parties). If the State objects, the parts of the contract affected by the reservation are completely cancelled and no longer create legal obligations for the reserving and accepting State, again only with regard to the other. Finally, if the State objects to them and rejects them, there are no legal obligations between those two Contracting States under this Treaty. The opposing and opposing State essentially refuses to recognize that the reserving State is a contracting party.  The EU may conclude international agreements on matters related to the common foreign and security policy. In this case, the Council of Ministers shall act unanimously i instead of the usual qualified majority vote i. .