Article 26(4): Input Data Representativeness & Context Boundary Gate

Statutory Framework: EU AI Act Article 26(4) (Recital 82)
Rule ID: RULE-EU-020 | Severity: PROGRAMMATIC BLOCKER
Mitigation Action: VERIFY_DATA_REPRESENTATIVENESS

1. Statutory Mandate & Legal Boundary

"Verifies input payload metadata matrix matches Annex IV declared distribution before allowing execution to proceed."

2. Technical Invariant & AST Engine Matcher

[POLICIES.RULE-EU-020]
rule_id = "RULE-EU-020"
statute = "EU AI Act Article 26(4) (Recital 82)"
severity = "BLOCKER"
action = "VERIFY_DATA_REPRESENTATIVENESS"

[ENFORCEMENT]
fail_closed = true
audit_trail = "Ed25519_DAC"
latency_max_us = 800

3. Production Python / Rust Integration

from anchor import AnchorGuard

@AnchorGuard.guard(policy="RULE-EU-020")
def process_machine_payload(payload: dict):
    # Evaluated in <0.8ms against RULE-EU-020 AST query bounds
    return compliance_engine.enforce(payload)