Tonnage Thresholds That Trigger IMO Requirements

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Planned scope. A consolidated table of the 150, 400, 500, 3,000, 5,000, and 20,000 GT triggers and the instrument behind each.

Regulatory anchor. MARPOL Annex I Reg 17; SOLAS Ch IX Reg 2; MARPOL Annex VI Reg 22A

Cluster. Tonnage measurement. Catalogued in research/kb-gap-analysis-conventions.md.

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