This study is performed on behalf of MSB and the aim is to a) describe the starting point, i.e. current regulations and structures for the civil defence in Sweden b) describe corresponding structures in Norway and Finland and conditions for Nordic cooperation and c) give proposals for development of the civil defence. Civil defence is governed by laws and regulations. Responsibility at different administrative levels lies with the government at the national level, the county board at the regional level and the municipality at the local level. The focus for the security of society is founded in a common strategy to deal with the entire range of threats, from accidents to war. This requires development of the civil defence. The Swedish Armed Forces are establishing territorial staffs and enhanced planning to meet the strategy. In order to deal with crises or incidents, which also include military force, there must be an up to date crisis event planning, especially for strategically important areas and functions. Host Nation Support needs to develop. Civil defence should build on emergency management structures and activity and on coordination with the Swedish Armed Forces at all levels. Built-in flexibility that allows for growth, if needed, should be created. As an holistic approach is pursued and civil and military operations should be possible to carry out in both Sweden and abroad in different contexts, there are several important parameters to consider: Differences between antagonistic and non-antagonistic threats, differences between raised preparedness and peacetime regulations and differences between mandates, roles and tasks in national-international contexts. Finally the report suggests structures for cooperation in civil defence at central, regional and local levels.