Where the DPR describes it

7.3. Q4 AOP GateMonitoring · PDF p.22
The Q4 control is intentionally simple: the next AOP entry is enabled after the SPV submits the Q4 monitoring form. State/Centre review may continue independently so the gate improves data discipline without creating an unnecessary approval bottleneck.
Read the full section (2 diagrams) →

2. The steps and decisions: BPMN process flow

Background: architecture and overview