Sparkling wines are produced worldwide, but many legal structures reserve the word "Champagne" exclusively for sparkling wines from the Champagne region, made in accordance with regulations. In the European Union and many other countries the name "Champagne" is legally protected by the Madrid system under an 1891 treaty, which reserved it for the sparkling wine produced in the eponymous region and adhering to the standards defined for it as an ""; the protection was reaffirmed in the Treaty of Versailles after World War I. Similar legal protection has been adopted by over 70 countries. Most recently Australia, Chile, Brazil, Canada and China passed laws or signed agreements with Europe that limit the use of the term "Champagne" to only those products produced in the Champagne region. The United States bans the use from all new U.S.-produced wines. Only those that had approval to use the term on labels before 2006 may continue to use it and only when it is accompanied by the wine's actual origin (e.g., "California"). The majority of US-produced sparkling wines do not use the term "Champagne" on their labels, and some states, such as Oregon, ban producers in their states from using the term.