On 13 December 2019 the NEA held an ad hoc meeting on the commonalities between and the specificities of decommissioning and legacy management. The meeting was attended by 18 experts from seven NEA member countries and the IAEA that included regulators, government officials, as well as decommissioning and legacy management specialists. Participants discussed shared areas of work between the decommissioning and legacy management fields, as well as those areas that are particular to either. The participants identified priority common issues and noted these in a draft mandate for a potential new expert group to be established under the NEA Committee on Decommissioning of Nuclear Installations and Legacy Management (CDLM).