But Mexico argues the U.S. cannot legally change the Gulf's name because the United Nations Convention on the Law of the Sea dictates that an individual country's sovereign territory only extends up to 12 nautical miles out from the coastline.

MEXICO CITY (Reuters) - Mexico's President Claudia Sheinbaum said on Wednesday that her government will send a letter to Google after the internet giant said it would change the name of the Gulf of Mexico for users of Google Maps in the United States.