Current rule layer
Compass prefers the administering agency or current Australian guide for live rates and eligibility.
Cross-check layer
Secondary sources such as ISSA or OECD can explain system structure or offer comparative context. When figures differ, Compass keeps the conflict visible rather than silently averaging them.
Why dates matter
Rates, thresholds and indexation dates change. Payment pages should show the source edition, effective date or retrieval date wherever available.