See: http://www.klm.com/travel/nl_en/travel_information/baggage/baggage_allowance/index.htm
An international flight takes-off in one country and lands in a different country.
110 to 130 MHz.
If coming from the US, Canada is another nation just like Mexico.
im assuming so as its not a substance you smoke. i was using my snus on the flight back form Norway fine without any problems.