Antarctic tourism has significantly increased – both in visitor numbers and types of activities - and further increases are projected. Many of the 29 countries that jointly manage Antarctica are concerned that the 1991 Environmental Protocol and other regulations provide insufficient protection for nature, safety and science. This research program supports the Netherlands in proactive management of tourism within the Antarctic Treaty System (ATS) on four themes: (1) maximizing visitor numbers by a cap-and-trade system; (2) constraining diversification of activities by pre-assessment procedures; (3) improving domestic implementation of ATS tourism regulations; and (4) enhancing the role of non-use and non-user States.