The Protocol on Environmental Protection to the Antarctic Treaty (the "Madrid Protocol") was negotiated as other countries followed suit and on 14 January 1998 it entered into force.
O Protocolo sobre Proteccíón Ambiental do Tratado Antártico (tamén coñecido como 'Protocolo de Madrid') foi negociado e o 14 de xaneiro de 1998 entrou en vigor.