Coherence without
uniformity.

The proposition

The Carbon Basel Accord proposes a shared architecture for maritime decarbonisation: comparable measurement, interoperable carbon pricing and coordinated supervision. Its purpose is to connect the evidence, incentives and institutions on which the transition depends, while preserving the authority of existing regulators.

A fuel claim, an emissions report and a compliance decision can move through different institutions without a common interpretation of the underlying evidence. The book argues that this fragmentation creates uncertainty for operators, fuel suppliers, investors and authorities. Adding obligations alone cannot resolve disagreements over measurement boundaries, recognition of fuel claims or responsibility for a discrepancy. The proposed response is a framework that makes these interfaces explicit.

Three pillars. One architecture.

A sequence for implementation

The book describes a progression from limited pilots to wider institutional coordination. These are proposed stages, not an announced programme or a guaranteed timetable.

1. Prototype integrationTest common data definitions, fuel passports and verification interfaces in a bounded pilot.
2. Pathway consolidationAssess whether participating suppliers, ports and verifiers can consistently use the same evidence.
3. Institutional embeddingAgree responsibilities, recognition conditions and escalation procedures across participating bodies.
4. Wider coherenceExtend arrangements only after their technical performance and institutional acceptance are demonstrated.

What a first pilot should demonstrate

A useful first pilot would follow one fuel batch through measurement, commercial interpretation and supervisory review. Its success should be judged against evidence:

• Traceability: can reviewers reconstruct the source, methodology, version and verification status of each material value?
• Comparability: are emissions boundaries, units and reporting periods explicit, with disagreements recorded?
• Accountability: does every unresolved discrepancy have an owner, an escalation route and a closure record?
• Practical value: does the pilot reduce repeated data work or disputed claims without weakening verification?

Implementation would require agreement on data access, confidentiality, verifier competence, recognition rules and resources. Capacity-building and proportionate participation are central to the book's equity argument. A digital signature can identify a record's issuer and reveal later alteration; it cannot establish that the original claim was accurate.

Follow a fuel-documentation discrepancy through all three pillars.

Status and scope

The Carbon Basel Accord is an independent policy proposal. This companion brief does not establish an adopted international accord, regulatory endorsement or a new compliance obligation. Expected benefits depend on implementation and evidence; existing requirements continue to govern actual compliance decisions.