This research offers proposals for the governance of the main currently discussed geoengineering concepts at the international climate policy level. Based on analysis of the existing regulatory framework and its gaps, the study identifies general options and specific recommended actions for the effective governance of geoengineering. First, the study explores whether and to what extent it is useful and feasible to have a single definition of geoengineering for governance purposes and analyses the existing governance of geoengineering in international law. Second, the authors seek to derive core elements of appropriate governance design from these objectives and criteria. Third, they assess which geoengineering techniques require international governance on the basis of the objectives and criteria. Fourth, governance gaps are identified where it is argued that the existing international framework does not correspond to our proposed core governance elements. Fifth, proposals are made to fill those gaps.