Secretary of State Clinton calls for limits on tourism in Antarctica . the United States is proposing new limits on the number of landings from tourist vessels . At the same time , the United States is proposing new requirements for lifeboats on tourist ships `` to make sure they can keep passengers alive until rescue comes , '' Clinton noted . Clinton addressed State and Antarctic Treaty Consultative Meeting . Twelve nations signed the Antarctic Treaty in 1959 ; Twelve nations abide by it today .
Secretary of State Clinton calls for limits on tourism in Antarctica . the United States is proposing new limits on the number of landings from tourist vessels . Clinton addressed State and Antarctic Treaty Consultative Meeting . Twelve nations signed the Antarctic Treaty in 1959 ; Twelve nations abide by it today .