The country's congress approved the new law unanimously and now all stations and public transport must display a sign which reads: "Las Malvinas son Argentinas".
This translates as: “The Falklands are Argentina”.
In a letter, Teresita Luna, the politician who proposed the law, said: “I am certain that this will generate a permanent reflection on our undeniable sovereignty over the Falklands.
“It is directed not only at the foreigner who comes here as a tourist or visits our country, but also at the citizens in general, and will serve to reinforce our history, our culture and our identity.”
She said that the regulation would “reaffirm our sense of inalienable sovereignty over the Falkland Islands.”
Roger Edwards, chairman of the Falklands Legislative Assembly, was unimpressed by the decision.