Mission owners prepare from the start for eventual off-boarding to a new CSO or back to DoD, and CSPs support it: mission owners must be able to receive all their data from the CSO at any time in a usable, agreed format, with all audit logs relevant to their use of the CSO made available; data encrypted at rest is cryptographically erased by the departing mission owner and backups and replicas held by the CSP are erased too; after verified transfer the CSP destroys any remaining DoD data and certifies destruction, with the contract and SLA setting the terms.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.