In the year the treaty was adopted, two amending protocols were added. Countries can ratify the main treaty without necessarily ratifying these optional agreements. International treaties and conventions contain rules on what institutions could sign or ratify or adhere to. Some treaties are limited to UN member states or parties to the status of the International Court of Justice. In rare cases, there is an explicit list of entities to which the treaty is limited. More often, the objective of the negotiating states (most or all those who generally become founding signatories) is that the treaty should not be limited to certain states and that, therefore, a wording such as „this treaty is a state that is ready to accept its provisions“ (the formula of all states) is signed. Mr. Kovrig`s immunity under the convention, which includes release from arrest or detention, generally ended when he took his leave from the government to work for the International Crisis Group, a think tank. But there is still a small part that covers all the activities he has carried out during his diplomatic work.
That is the reason that led to Mr. Trudeau`s accusation. China refers to another part of the convention that diplomats should not interfere in the host country`s internal affairs to support its assertion that Canada violated international law in the organization of the ambassadors` letter. Both countries can take their beef to the International Court of Justice, which the United States did in 1979, when Iran held more than 50 Americans hostage for more than a year. The Sino-Canadian diplomatic dispute is not yet ready. The agreement applies only to written contracts between states. The first part of the document defines the terms and scope of the agreement. The second part sets out the rules governing the conclusion and adoption of contracts, including the agreement of contracting parties and the formulation of reservations, i.e. the refusal to be bound by one or more specific provisions of a contract, while they accept the rest.
The third part deals with the application and interpretation of contracts and the fourth part examines the possibilities of amending or amending contracts. These parts essentially codify existing customary law. The most important part of the agreement, Part V, sets out the reasons and rules governing the non-publication, termination or suspension of contracts and contains a provision that gives the International Court of Justice jurisdiction over disputes arising from the application of these provisions.