# European Commission CBAM Registry XML Declaration Guide
> Automated XML and JSON declaration generator for quarterly customs filings.

- **Canonical URL:** https://stanzaapi.com/tools/cbam-carbon/compliance/quarterly-declaration-guide
- **Governing Standard:** Regulation (EU) 2023/956 & 2023/1773 (European Commission EUR-Lex CBAM Portal)
- **Latency:** <3ms Edge
- **Privacy:** In-memory execution only (zero data stored or logged)

## Technical Overview & Governing Rules
Importers and authorized CBAM declarants must submit quarterly declarations detailing commodity CN codes, net mass, direct and indirect embedded emissions, country of origin, and carbon price deductions. The API produces full XML schemas conforming to urn:eu:taxud:cbam:v1.

## Specification Matrix
| Field | Type | Description |
| --- | --- | --- |
| reportingPeriod | String (e.g. 2026-Q1) | Quarterly reporting window |
| declarantId | String (EORI) | Authorized declarant EORI number |
| importerCountry | String (ISO-2) | EU Member State of importation |

## Standard JSON Response Model
```json
{
  "declarationId": "CBAM-DECL-2026-Q1-DE987654",
  "totalItems": 1,
  "totalMassTonnes": 50,
  "totalEmissionsTco2e": 123.011
}
```

## Frequently Asked Questions & Edge Cases
### Q: What is the XML namespace used for CBAM declarations?
**A:** Declarations conform to urn:eu:taxud:cbam:v1 with full GoodItem, DirectEmissions, and NetFinancialLiability tags.