I am surprised Chile would be a part of it or have I missed something ?
Argentina has already abused the free traffic rights into Puerto Arenas in Chile, claiming the waters to be their own, despite being as free as the English Channel. Lets to do same to them. There is far more Argentine traffic coming to Europe than anything going to the Falklands. If you want to sail into our waters then HM Customs has to issue you a permit in Port Stanley. Protected by the Royal Navy of course while they are in Falklands waters.