Trade in offsets is a bottom-up private sector and citizen-consumer led approach to reducing carbon emissions. The success of trading depends (in part) on the regulatory capabilities of law - to ensure transactions are completed and to safeguard the system's integrity against fraud and manipulation. The project researches emerging legal provisons for voluntary trades, including standards for offsets verification, draws lessons from regulation of other environmental/financial trades and services, and considers law's capacity to construct and guide new markets. The intended outcomes are well-formed and realistic recommendations for Australian regulation in an international market, together with insights into law.