Over the last 24 hours industry coverage has highlighted how the IMO is advancing a package of environmental regulations around the use of ammonia as a marine fuel and designing a two‑tier carbon pricing regime due to start in 2028. Building on PPR 13 discussions and the Interim Guidelines for the Safety of Ships Using Ammonia as Fuel, the organization is addressing ammonia effluents and emissions while planning base and penalty carbon levies to steer shipping toward zero‑carbon fuels.
Recent specialist reporting describes how, following the IMO’s Sub‑Committee on Pollution Prevention and Response (PPR 13) in 2026, regulators have intensified their focus on the environmental profile of ammonia as a marine fuel. Discussions at PPR 13 explicitly addressed the management of ammonia effluents, signalling that the IMO is now considering the fuel’s broader ecological impacts, including potential toxicity and effects on marine ecosystems and port environments, rather than only its carbon credentials. In parallel, the IMO’s Interim Guidelines for the Safety of Ships Using Ammonia as Fuel, issued in 2025, provide the framework for flag‑state approval and design requirements for ammonia‑powered ships, setting safety baselines but not solving infrastructure challenges in ports.
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