r Preservation Implementation Plan for that data and to distribute it 
to their consumers.  For example, in cases where SIPs only reference digital objects, the 
repository must also reference the digital objects or preserve them if the current repository is 
not committed to such preservation. 
4.1.7 The repository shall provide the producer/depositor with appropriate responses 
at agreed points during the ingest processes. 
AUDIT AND CERTIFICATION OF TRUSTWORTHY DIGITAL REPOSITORIES 
CCSDS 652.0-M-1 
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