One of the least explored but increasingly important areas of critical energy infrastructure protection concerns offshore oil and gas installations. The international regulatory framework provides a number of countervailing measures that can be used by states to protect offshore installations and respond to attacks and security incidents involving these installations. Mikhail Kashubsky who is with the Centre for Customs and Excise Studies in Australia explores the international regulatory aspects of offshore installations security in the second part of a three-part series for the Journal of Energy Security.