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 . Secretary of State Hillary Clinton called for limits on tourism in Antarctica . U.S. is proposing new limits on the number of landings from tourist vessels . Clinton attended Arctic Council and Antarctic Treaty Consultative Meeting . Sixteen nations signed the Antarctic Treaty in 1959 ; 47 nations abide by it today .
Secretary of State Hillary Clinton called for limits on tourism in Antarctica . U.S. is proposing new limits on the number of landings from tourist vessels . Clinton attended Arctic Council and Antarctic Treaty Consultative Meeting . Sixteen nations signed the Antarctic Treaty in 1959 ; 47 nations abide by it today .