Dr Rosalie Balkin is Assistant Secretary of the Public International Law Branch in the Office of International Law of the Commonwealth Attorney-General's Department. The office advises government on all aspects of public international law, including its implementation in Australian law. Dr Balkin has responsibility for advising on questions of maritime pollution. She studied at the University of the Witwatersrand in South Africa and obtained her doctorate from that university in 1978. Her thesis was titled ‘The Treaty Making Powers of the Union and Republic of South Africa’. She has published extensively in the field of international law and has held academic positions at several universities both in Australia and abroad, the most recent appointment being at Cambridge University in 1991–92. Dr Balkin has headed the Australian Government Delegation to the IMO Legal Committee for several years and, since 1993, has been the Vice Chairman of the Legal Committee. She has also recently been appointed as a member of the Board of Governors of the World Maritime University.
Professor Desmond Ball is a Professor in the Strategic and Defence Studies Centre, Australian National University, Canberra. (He was Head of the Centre from 1984 to 1991.) Professor Ball is the author or editor of some 40 books or monographs on nuclear strategy, defence decision-making, Australian defence, and security in the Asia-Pacific region. His recent publications include monographs entitled ‘Building Blocks for Regional Security: An Australian Per-