Your comment would make a lot more sense if it wasn't the very government that's charged with enforcing these laws that's saying Monsanto isn't following them.
It's funny that you act like Monsanto is the legal enforcement entity here and the Argentina government are the lawbreakers. But hey, even if you weren't spouting corporate B.S., the right thing for Monsanto to do is to use the legal avenues available to them to hold the government accountable - not coerce private companies into doing their bidding.
International shipping companies are subject to international law. Monsanto is threatening them with international law. That is fully within their bounds.
Argentina is operating outside of the international laws and norms here, and should reap the consequences.
It's funny that you act like Monsanto is the legal enforcement entity here and the Argentina government are the lawbreakers. But hey, even if you weren't spouting corporate B.S., the right thing for Monsanto to do is to use the legal avenues available to them to hold the government accountable - not coerce private companies into doing their bidding.