What does 6.9 require?

In phase F the supplier's system engineering function supports the entity responsible for disposal under the terms of a business agreement, supports the Mission Close-out Review and sees that its actions are implemented.

ECSS-E-ST-10C System Engineering General Requirements...

Other controls in Clause 6: System engineering activities by project phase – ECSS-E-ST-10C System Engineering General Requirements (2009 edition)

6.2 Plan and monitor system engineering activities by project phase and identify critical elements
6.3 Phase 0: support need identification and propose system concepts
6.4 Phase A: finalise the needs and propose solutions with their risks
6.5 Phase B: establish the preliminary definition and demonstrate it meets the requirements
6.6 Phase C: establish the detailed definition and demonstrate the capability to meet the specification
6.7 Phase D: complete qualification and acceptance and prepare for operations
6.8 Phase E: support the launch campaign, operations and anomaly resolution

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The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.

MCP endpoint All ECSS-E-ST-10C System Engineering General Requirements (2009 edition) controls