Co-operation within the justice sector is undertaken by the Nordic Justice Ministers. It is based on the principles of the Helsinki Treaty, the overarching principles and priorities of Nordic co-operation and the present co-operation programme. The Co-operation Programme for Justice Affairs in the 2025–2030 period prioritises the areas of Nordic legal cohesion, legal certainty in the Nordic Region and the prevention and combating of criminality. The co-operation also places special focus on the prevention of criminality and terrorism, which is often cross-border in nature.