In the context of transparency, there exist various stakeholders, in other words, information providers/receivers. Stakeholders include individuals and organizations such as facility operators, inspectors, research institutions, academic institutions, and the public as well as the IAEA and the state governments . In order to facilitate and simplify the discussion of transparency, it was proposed to categorize these stakeholders (see Fig. 2) into Track I (governmental organizations), Track II (non-governmental, professions) and others (public, media, others)  from the viewpoint of the security level of information that they can receive .
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