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http://store.apple.com/Catalog/US/Images/wty-post1997.html
OBTAINING WARRANTY SERVICE
If you purchased the product in the U.S. and Canada, deliver the product, at your expense, to any Apple Authorized Service Provider located in U.S. and Canada. If you purchased the product in Latin America or the Caribbean, deliver the product to any Apple Authorized Service Provider in the country where you purchased the product. If the product is portable, meaning that it can operate independently without a power cord, you may obtain warranty service worldwide.
Abracos,
Gustavo