====== 4. Architectural Principle and Requirements ======
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Governed financial processing has an economic footprint. The architecture treats that footprint as an explicit architectural concern.

===== 4.1 Architectural Principle =====
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The Cost Recovery, Compensation, and Settlement Plane supports economic accountability for governed work. It separates efficient compliant processing from under-compliance, supports ordinary accounting treatment, and preserves content minimization.

===== 4.2 Requirements =====
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  - The architecture SHALL make the cost of governed work visible, attributable, auditable, comparable, and recoverable.
  - The architecture SHALL distinguish low-cost compliant processing from under-compliance.
  - The architecture SHALL support compensation only when a qualified Node performs required work and produces the required evidence.
  - The architecture SHALL support cost competition only among Nodes that satisfy the same semantic, policy, evidence, security, residency, sovereignty, and operational obligations.
  - The architecture SHALL minimize the information exposed to the Cost Recovery, Compensation, and Settlement Plane.