巴西主導碳市場互通聯盟，跨境交易仍須對齊 MRV、配額與權利紀錄

巴西主導的合規碳市場開放聯盟 OCCCM 正嘗試讓分散的國家與區域碳市場提高互通性，工作重點包括監測、報告與查證，碳會計、完整性與長期互認。Eco-Business 指出，聯盟仍需處理不同碳價、配額與信用額制度、邊境措施及開發中經濟體的公平疑慮。互通目標不等於各市場的單位已可自由替代或結算。

The Brazil-led Open Coalition on Compliance Carbon Markets is seeking greater interoperability among fragmented national and regional systems. Its agenda covers monitoring, reporting and verification, carbon accounting, integrity and long-term recognition. Eco-Business reports continuing disagreements over carbon prices, allowance and credit designs, border measures and fairness for developing economies. An interoperability goal does not make units freely substitutable or immediately settleable across markets.

全球碳定價制度同時包含碳稅、總量管制與交易，以及基準與信用額機制。Eco-Business 報導截至 2026 年 4 月已有 87 項政府碳定價政策，涵蓋近 30% 全球排放並在 2025 年創造 1,070 億美元收入。巴西雖擔任聯盟主席，但本國排放交易制度仍在設計，交易預計 2030 年開始。Reuters 另記錄巴西規劃分階段建立 MRV 與市場，以及森林碳權跨境銷售案例。

Global carbon pricing includes taxes, cap-and-trade systems, and baseline-and-credit schemes. Eco-Business reports 87 government carbon-pricing policies as of April 2026, covering nearly 30% of global emissions and raising USD 107 billion in 2025. Brazil chairs the coalition while its own emissions-trading system remains under design, with trading expected in 2030. Reuters has separately documented Brazil's phased MRV and market plan and a cross-border sale of jurisdictional forest credits.

市場互通不只是把不同碳價換算成同一貨幣。各制度需要釐清受管制主體、排放邊界、基準、配額核配、銀行與借用、抵換上限、信用額方法、避免重複計算、登錄所有權及違約處理。若跨境買方只收到憑證，卻無法核對原市場的繳交義務、序號、轉移與註銷紀錄，交易可能同時面臨環境完整性、會計與法律權利風險。

Interoperability is not a currency conversion between carbon prices. Systems must align regulated entities, emissions boundaries, baselines, allowance allocation, banking and borrowing, offset limits, credit methodologies, double-counting controls, registry ownership and default treatment. A buyer receiving only a certificate, without evidence of the original market obligation, serial number, transfer and retirement, faces environmental-integrity, accounting and legal-title risks.

市場管理機構應建立制度對照表，逐項比對排放範圍、計量方法、查證資格、配額與信用額法律性質、登錄欄位、轉移限制及違約規則。交易平台、銀行與中介機構須保存成交指令、買賣契約、登錄序號、所有權轉移、付款與結算紀錄，以及任何對應調整或註銷。受管制企業則要把設施排放、查證聲明、配額帳戶、繳交紀錄與跨境採購用途連到同一報告期。

Market administrators should maintain rule crosswalks covering emissions scope, measurement, verifier eligibility, the legal nature of allowances and credits, registry fields, transfer restrictions and penalties. Trading venues, banks and intermediaries should retain orders, sale contracts, registry serials, title transfers, payment and settlement records, plus any corresponding adjustment or retirement. Regulated companies should link facility emissions, verification statements, allowance accounts, surrender records and the purpose of cross-border purchases to the same compliance period.

三筆固定來源提供互補證據。Eco-Business 說明 OCCCM 的治理目標、技術分歧與巴西領導角色。Reuters 的 2026 年 5 月報導記錄巴西碳市場預計自 2027 年起分三階段建立 MRV、產業義務與交易制度；Reuters 的 2025 年報導記錄巴西司法管轄森林碳權的 500 萬單位銷售安排、約 1.5 億美元規模與社區收益條件。它們支持制度與交易正在形成，不代表不同市場單位已取得自動互認。

Three fixed-scope reports provide complementary evidence. Eco-Business explains the OCCCM governance aim, technical disagreement and Brazil's leadership. Reuters reported in May 2026 that Brazil plans a three-stage rollout beginning with MRV in 2027 and moving toward sector duties and trading. A 2025 Reuters report documents a sale arrangement for five million Brazilian jurisdictional forest credits, an indicated value of about USD 150 million and community-revenue conditions. These show institution and transaction formation, not automatic mutual recognition of units.

若互通機制逐步成形，出口製造、金融與碳資產管理將面臨更細緻的權利與資料核對。CBAM 類邊境成本可能與本國已付碳價的承認方式連動，但是否抵扣取決於具體制度與證據。全球南方市場也需證明收益分配、社區權利與信用額完整性，避免把技術互通誤解為環境或社會品質的等同認證。

If interoperability develops, exporters, financial institutions and carbon-asset managers will face more detailed title and data checks. Recognition of carbon prices paid at home may affect border costs such as CBAM, but any deduction depends on specific rules and evidence. Global South markets must also evidence benefit sharing, community rights and credit integrity, because technical interoperability is not equivalent to environmental or social certification.

SNN editorial analysis：外部變化是巴西主導的 OCCCM 嘗試把分散的合規碳市場轉向 MRV、碳會計與登錄權利的互通討論；這項制度變化會透過碳成本認列、CBAM 申報、跨境信用額契約與金融機構擔保品要求傳導到台灣鋼鐵、鋁業、石化出口商及碳資產中介，使台灣市場必須證明碳單位的來源、權利與使用目的。第一，台灣出口製造商的碳管理與報關主管應在每次 CBAM 申報及年度碳成本核對前，比對設施排放報告、查證聲明、原市場配額帳戶、繳交紀錄、付款憑證與可抵扣規則，並在制度對照變更時重算可承認金額。第二，台灣銀行、券商與碳交易中介的法遵及作業主管應在簽約、交割與資產估值時，核對買賣契約、信用額或配額序號、登錄所有權、轉移限制、結算紀錄與註銷狀態，權利鏈不完整時不得把單位列為可自由交易資產。第三，台灣企業永續與採購主管應在購買司法管轄森林信用額及發布氣候聲明前，比對方法學版本、監測報告、第三方查證、社區收益條款、對應調整與註銷證明，並在用途由自願聲明轉為合規履約時重新審查。這是揭露前證據基礎設施的條件式台灣傳導分析，不代表 OCCCM 已建立國際法義務，也不表示各國配額與信用額目前可以一比一互換。

SNN editorial analysis: The external change is the Brazil-led OCCCM effort to move fragmented compliance carbon markets toward interoperability through MRV, carbon accounting and registry rights. This institutional change can flow through carbon-cost recognition, CBAM filings, cross-border credit contracts and bank collateral requirements to Taiwan steel, aluminium and petrochemical exporters and carbon intermediaries, requiring the Taiwan market to prove each unit's origin, legal title and intended use. First, before each CBAM filing and annual carbon-cost reconciliation, Taiwan steel manufacturers' carbon managers and customs teams should compare facility emissions reports, verification statements, original-market allowance accounts, surrender records, payment receipts and deduction rules, and must recalculate recognised amounts when a rule crosswalk changes. Second, at contract execution, settlement and valuation, Taiwan bank compliance teams and carbon-intermediary operations teams should verify sale contracts, credit or allowance serials, registry title, transfer restrictions, settlement records and retirement status, and must not classify a unit as freely tradable when the title chain is incomplete. Third, before purchasing jurisdictional forest credits or releasing a climate claim, Taiwan company sustainability leaders and procurement leaders should reconcile the methodology version, monitoring report, third-party verification statement, community-benefit contract, corresponding-adjustment record and retirement certificate, and must reopen review when use changes from a voluntary claim to compliance. This Pre-Disclosure Evidence Infrastructure interpretation does not make OCCCM international law, and it does not mean allowances and credits are currently interchangeable one for one.

後續應追蹤 OCCCM 是否在兩年內提出可操作的制度對照、MRV 最低要求、登錄資料欄位與互認程序，也要觀察巴西自 2027 年起的 MRV 建置及 2030 年交易準備。若成員只交換經驗而沒有測試交易、權利轉移與結算，互通仍會停留在外交倡議。

Future review should test whether OCCCM produces an operational rule crosswalk, minimum MRV requirements, registry data fields and recognition procedures within two years. Brazil's MRV build from 2027 and preparations for 2030 trading will also matter. If members exchange experience without testing trades, title transfer and settlement, interoperability will remain a diplomatic proposal.