Well you inspired me to actually look this up for the first time. Turns out it's allowed, per Article 3 here: http://www.ats.aq/documents/recatt/Att010_e.pdf ht

Well you inspired me to actually look this up for the first time. Turns out it's allowed, per Article 3 here: http://www.ats.aq/documents/recatt/Att010_e.pdf http://www.ats.aq/documents/recatt/Att010_e.pdf but McMurdo stopped doing it in 1993 because it was more expensive than shipping unburnt waste north. ( http://www.southpolestation.com/trivia/igy2/incinerator.html http://www.southpolestation.com/trivia/igy2/incinerator.html ) So the category may well have been sort of vestigial.