Canon EOS-1D X Mark III Advanced User's Manual page 704

GPS Precautions
Countries/regions permitting use of GPS functions
Use of GPS features is restricted in some countries and regions, and illegal use may be
punishable under national or local regulations. To avoid violating GPS regulations, visit the
Canon website to check where use is allowed.
Note that Canon cannot be held liable for any problems arising from use of GPS functions in
other countries and regions.
Model number
EOS-1D X Mark III: DS126631 (GPS module model: ES300)
Because the use of GPS may be restricted in some countries and regions, follow local
laws and regulations where you will use the camera. Be particularly careful about using
GPS functions outside your home country.
Be careful about using GPS functions where the operation of electronic devices is
restricted.
Others may be able to locate or identify you by using location data in your geotagged
still images or movies. Be careful when sharing these geotagged still images, movies, or
GPS log files with others, such as when posting them online where many people can
view them.
GPS signal reception may take a longer time in some cases.
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