Although documents may not be classified within the legal regime of EUCI, other markings and internal rules on non-disclosure could apply. In the current framework, besides the classification markings, the Commission has twenty-two categories of protected information with specific distribution and handling instructions, which are not made public (nota de subsol nr. 34: Respondent No 15). These categorizations address the different Directorates in the Commission and the Units (nota de subsol 35: Respondent No 16). Commission officials acknowledge that there is ‘internally a confusion regarding what happens and what is classification’ (nota de subsol 36: Respondent No 10).
(Official Secrets and Oversight in the European Union, Oxford University Press, 2019, la p. 78)