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+# Global Regulatory Harmonization Suite (GRHS)
+
+## Overview
+
+The GRHS establishes DBIS as a central harmonization authority aligning international regulations, sovereign banking laws, global AML/KYC frameworks, CBDC issuance standards, and trade finance and securities rules.
+
+## Harmonization Pillars
+
+### Pillar I – Monetary Harmonization
+- FX stabilization rules
+- Sovereign liquidity minimums
+- CBDC interoperability requirements
+
+### Pillar II – Legal Harmonization
+- Standardized settlement law
+- Unified arbitration and enforcement
+- Cross-border recognition of DBIS authority
+
+### Pillar III – Compliance Harmonization
+- FATF-Plus standards
+- Integrated sanctions regime
+- AML/KYC equivalency protocols
+
+### Pillar IV – Trade Harmonization
+- ICC UCP/URDG/eUCP uniform adoption
+- Standardized digital document formats
+- Commodity and security tokenization rules
+
+## Regulatory Equivalence Protocol (REP)
+
+A sovereign may be declared **Regulatory Equivalent** if:
+
+```
+REP_SCORE = (compliance + transparency + AML_strength + CBDC_maturity) / 4 ≥ 95%
+```
+
+Grants:
+- Fast-track settlement privileges
+- Preferential liquidity access
+- Reduced oversight frequency
+
+## API Endpoints
+
+### Initialize GRHS
+```http
+POST /api/v1/grhs/initialize
+```
+
+### Get REP Score
+```http
+GET /api/v1/grhs/rep/:sovereignBankId
+POST /api/v1/grhs/rep/:sovereignBankId/calculate
+```
+
+### Assess Compliance
+```http
+GET /api/v1/grhs/compliance/:sovereignBankId
+```
+
+### Fast-Track Privileges
+```http
+POST /api/v1/grhs/fast-track/:sovereignBankId
+GET /api/v1/grhs/fast-track/:sovereignBankId/:privilegeType
+```
+
+### Get Rules
+```http
+GET /api/v1/grhs/rules/monetary
+GET /api/v1/grhs/rules/legal
+GET /api/v1/grhs/rules/compliance
+GET /api/v1/grhs/rules/trade
+```
+
+## Usage Example
+
+```typescript
+import { grhsService } from '@/core/compliance/grhs';
+
+// Initialize GRHS
+await grhsService.initialize();
+
+// Calculate REP score
+const repScore = await grhsService.calculateREPScore(sovereignBankId);
+
+// Assess compliance
+const compliance = await grhsService.assessCompliance(sovereignBankId);
+
+// Grant fast-track privileges
+if (repScore.equivalent) {
+  await grhsService.grantFastTrackPrivileges(sovereignBankId);
+}
+```
+
+## Database Models
+
+- `RegulatoryHarmonizationRule`: Harmonization rules by pillar
+- `RegulatoryEquivalenceScore`: REP scores for sovereigns
+- `HarmonizationCompliance`: Compliance tracking per sovereign
+- `FastTrackPrivilege`: Fast-track settlement privileges
+