cluding access by users to the 
repository system, for example, physical security and user authentication, and the different 
stages of accessing records (making a request, verifying the rights of the requester, and 
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CCSDS 652.0-M-1 
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September 2011 
preparing and sending a Dissemination Information Package [DIP]). This subsection is 
concerned with all of these. It is divided into two main requirements, one concerned with the 
existence