When does the contract of Antarctica run out?

Answer 1

The Antarctic Treaty stipulates that after 30 years, 'any party' can call for a review. Since 1991, no party has called for such a review, all acknowledging the value of the treaty which preserves all land on earth south of 60 degrees S for the scientific study of the health of planet.

In fact, according to the British Antarctic Survey site:

"The Treaty provided that any party could call for a review conference after the expiration of 30 years. No party has done so. In 1991, on the thirtieth anniversary of the Treaty, the parties recognised the continuing strength and relevance of the Treaty by adopting a declaration recording their determination to maintain and strengthen the Treaty and to protect Antarctica's environmental and scientific values."