Elements or components that an approved design to a now superseded Standard did not require need not be retrofitted. The routine service activity tied to an absent component is not counted as a defect or non-conformance when it cannot be performed (for example no retrofitted flow test equipment on a system installed to AS CA16, no speech intelligibility test on an emergency warning system installed to superseded AS 2220.2).
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.