Latest Amendments
Rule Amendments for Technical Rules and Guidance Issued on 25 December 2025
- A list summarising rule amendments for the Technical Rules and Guidance (Regulations for the Classification and Registry of Ships, Rules for Marine Pollution Prevention Systems, etc.) and each part of the Rules for the Survey and Construction of Steel Ships (Part A, Part B, etc.) can be found here.
Rule Amendments Download Package
- Rule Amendments Download Package
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Hull
Particularly relevant stakeholders
- Shipowner
- Shipyard
- Manufacturer
and Others - Related to Multihull Craft
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- Fore Peak Ballast Systems and Fore Peak Space Arrangements of Tankers
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- Amending Stability Information due to Conversions
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- Common Structural Rules for Bulk Carriers and Oil Tankers, 1 January 2024, Corrigenda 1
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- Amendment related to Part C of the Rules for Survey and Construction of Steel Ships (2025 Amendment 1)
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Material
Machinery
Particularly relevant stakeholders
- Shipowner
- Shipyard
- Manufacturer
and Others - Review of Expressions Used in Requirements for Pipes, Valves and Pipe Fittings
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- Approval of Synthetic Materials Used for Aftmost Stern Tube Bearings and Aftmost Shaft Bracket Bearings
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- Machinery of Polar Class Ships
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- Protection of Reciprocating Internal Combustion Engines against Explosions
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- Response Time of Safety Devices after Incinerator Flame Failure
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- Clarification of Safety Requirements for Selective Catalytic Reduction Systems
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- IACS Unified Requirement for Monitoring and Safety Devices of Exhaust Gas Cleaning Systems
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- Astern Power of Main Propulsion Machineries
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- Recent Amendments to the IGC Code (MSC.566(109)) and Review of Existing Requirements (Machinery Related)
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Equipment
Particularly relevant stakeholders
- Shipowner
- Shipyard
- Manufacturer
and Others - Prohibition of Extinguishing Media Containing Perfluorooctane Sulfonic Acid (PFOS)
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- Tests for Preventive Measures for Redundant Operations of Fixed Local Application Fire-extinguishing Systems
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- Ventilation Requirements for Totally Enclosed Lifeboats
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- Unified Interpretation for Launching Appliances for Rescue Boats
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- Unified Interpretation for Means of Escape from Steering Gear Spaces and Machinery Spaces of Category A
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- Service Suppliers Providing Commissioning Testing of Ballast Water Treatment Equipment
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- Unified Interpretation for Valves Fitted on Collision Bulkheads
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- Lifting Appliances (and Anchor Handling Winches)
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- Hydrocarbon Gas Detectors and Bilge High Level Alarms in Cargo Pump-rooms
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- Review of Existing Requirements of Part GF and Part N (Equipment Related)
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Electrical Installations
Particularly relevant stakeholders
- Shipowner
- Shipyard
- Manufacturer
and Others - Review of Guidance for the Approval of Materials and Equipment for Marine Use
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- Requirements for Electrical Installations of Dynamic Positioning Systems
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- Redundancy of Single Electric Propulsion Motors
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- Earth Fault Alarm Devices for High Voltage Electrical Installations
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Offshore
Survey
Editorial Correction
- Editorial Correction for Technical Rules and Guidance
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- The word “omitted” when used in the context of the rule amendments described in the Amendments means that the requirement in question was not amended and is still applicable as before; it does not mean that the requirement is no longer applicable or was deleted.