Intergovernmental agreement or international treaty

In order for two countries to be able to apply the new standard with each other, they must have an intergovernmental agreement. The OECD provides a model convention to this end, the Competent Authority Agreement, or CAA (from page 21). These model intergovernmental agreements can be used by states where the government itself has the jurisdiction to commit the country to the new standard. Switzerland will not apply the CAA, but will instead make bilateral agreements in the form of international treaties.