SUB-RULES-001
vatfix-rules-eu
EU VAT rules encoded as deterministic ruleset

STATUS: PENDING
REGISTRY: https://vatfix.eu
SNAPSHOT: https://vatfix.eu/REGISTRY_SNAPSHOT.json

Registered standard. Identity governed by VATFIX registry.

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Purpose

EU VAT rules encoded as deterministic ruleset. Defines validation rules for EU VAT numbers.

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What it Accepts

• Rule definitions
• Rule queries
• Country code and VAT number pairs

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What it Rejects

• Invalid rule syntax
• Invalid country codes
• Invalid VAT number formats

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What it Returns

• Rule definitions
• Failure codes: FAILURE_CODES.json
• Validation results based on rules

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What it Does NOT do

• Does not execute validation
• Does not process payments
• Does not provide API endpoints
• Does not guarantee rule accuracy
• Does not enforce rule application
• Does not provide customer support
• Does not modify VATFIX core semantics
• Does not guarantee rule completeness

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Termination Conditions

• Rule retrieval: Rule definition returned
• Invalid query: Rule not found
• Invalid input: Failure code returned

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Last Updated: 2026-01-27