| Resolution |
Revision |
Adoption Date |
Title |
Implementation Date |
| UR Z17 |
Rev.22 |
Aug. 2025 |
Procedural Requirements for Service Suppliers |
1 Jan. 2027 |
| UR M56 |
Rev.4 Corr.3 |
Sep. 2025 |
Marine gears – load capacity of involute parallel axis spur and helical gears |
--- |
| UR W28 |
Rev.3 |
Sep. 2025 |
Welding procedure qualification tests of steels for hull construction and marine structures |
1 Jan. 2027 |
| UR E22 |
Rev.3 Corr.1 |
Sep. 2025 |
Computer-based systems |
--- |
| UR W23 |
Rev.3 |
Sep. 2025 |
Approval of Welding Consumables for High Strength Steels for Welded Structures |
1 Jan. 2027 |
| UR W16 |
Rev.4 |
Sep. 2025 |
High Strength Steels for Welded Structures |
1 Jan. 2027 |
| UR W11 |
Rev.10 |
Sep. 2025 |
Normal and higher strength hull structural steels |
1 Jan. 2027 |
| UR C6 |
Rev.1 |
Sep. 2025 |
Requirements for Lashing Software |
1 Jan. 2027 |
| UR W10 |
Rev.3, Corr.1 |
Sep. 2025 |
Spheroidal graphite iron castings or ductile iron castings |
--- |
| UR M35 |
Rev.8 Corr.1 |
Jul. 2025 |
Alarms, remote indications and safeguards for main reciprocating I.C. engines installed in unattended machinery spaces
|
--- |
| UR M85 |
New Corr.1 |
Jul. 2025 |
Type approval testing of synthetic materials for aftmost propeller shaft bearings |
--- |
| UR M77 |
Rev.5 |
Jul. 2025 |
Storage and use of SCR reductants |
1 Jan. 2027 |
| UR M67 |
Rev.3 |
Aug. 2025 |
Type Testing Procedure for Crankcase Oil Mist Detection and Alarm Equipment |
1 Jan. 2027 |
| UR P1 |
Rev.6 |
Jun. 2025 |
Rules for pipes |
1 Jul. 2026 |
| UR S10 |
Rev.8 |
Sep. 2025 |
Rudders, Sole Pieces and Rudder Horns |
1 Jan. 2027 |
| UR W8 |
Rev.5 |
Jun. 2025 |
Hull and machinery steel castings |
1 Jan. 2027 |
| UR E18 |
Rev.2 |
Jun. 2025 |
Recording of the Type, Location and Maintenance Cycle of Batteries |
1 Jul. 2026 |
| UR I2 |
Rev.5 |
Jun. 2025 |
Structural Requirements for Polar Class Ships |
1 Jan. 2027 |
| UR M53 |
Rev.6 |
Apr. 2025 |
Calculations for I.C. Engine Crankshafts |
1 Jan. 2027 |
| UR M78 |
Rev.3 |
Apr. 2025 |
Reciprocating Internal Combustion Engines Fuelled by Gases or Low-flashpoint Fuels |
1 Jan. 2027 |
| UR M44 |
Rev.11 |
Apr. 2025 |
Documents for the Approval of Reciprocating Internal Combustion Engines |
1 Jan. 2027 |
| UR M51 |
Rev.5 |
Apr. 2025 |
Factory Acceptance Test of Reciprocating Internal Combustion Engines |
1 Jan. 2027 |
| UR M71 |
Rev.1 |
Apr. 2025 |
Type Testing of Reciprocating Internal Combustion Engines |
1 Jan. 2027 |
| UR M87 |
New |
Apr. 2025 |
Certification Scheme for Reciprocating Internal Combustion Engines |
1 Jan. 2027 |
| UR M88 |
New |
Apr. 2025 |
Shipboard Trials of Reciprocating Internal Combustion Engines |
1 Jan. 2027 |
| UR M74 |
Rev.3 |
Mar. 2025 |
Ballast Water Management Systems |
1 Jan. 2027 |
| UR F45 |
Rev.1 |
Mar. 2025 |
Installation of BWMS on-board ships |
1 Jan. 2027 |
| UR F44 |
Rev.3 Corr.1 |
March 2025 |
Fore peak ballast tanks and space arrangements on oil & chemical tankers |
--- |
| UR W7 |
Rev.5 |
Feb. 2025 |
Hull and machinery steel forgings |
1 Jan. 2027 |
| UR Z11 |
Rev.7 |
Feb. 2025 |
Mandatory Ship Type and Enhanced Survey Programme (ESP) Notations |
1 Jan. 2027 |
| UR E15 |
Rev.5 |
Jan. 2025 |
Electrical Services Required to be Operable Under Fire Conditions and Fire Resistant Cables |
1 Jul. 2026 |
| UR F43 |
Del |
Jan. 2025 |
Installation requirements for analysing units for continuous monitoring of flammable vapours |
--- |
| UR W35 |
Rev.2 |
Feb. 2025 |
Requirements for NDT Service Suppliers |
1 Jan. 2027 |
| UR W10 |
Rev.3 |
Feb. 2025 |
Spheroidal graphite iron castings or ductile iron castings |
1 Jan. 2027 |
| UR W9 |
Rev.3 |
Feb. 2025 |
Grey iron castings or flake graphite iron castings |
1 Jan. 2027 |
| UR Z15 |
Rev.4 |
Jan. 2025 |
Hull, Structure, Equipment and Machinery Surveys of Mobile Offshore Units |
1 Jul. 2026 |
| UR M25 |
Rev.5 |
Dec. 2024 |
Astern power for main propulsion |
1 Jan. 2026 |
| UR I3 |
Rev.2 Corr.1 |
Dec. 2024 |
Machinery Requirements for Polar Class Ships |
--- |
| UR Z17 |
Rev.21 |
Jan. 2025 |
Procedural Requirements for Service Suppliers |
1 Jul. 2026 |
| UR Z17 |
Rev.20 |
Nov. 2024 |
Procedural Requirements for Service Suppliers |
1 Jan. 2026 |
| UR W27 |
Rev.3 Corr.1 |
Dec. 2024 |
Cast Steel Propellers |
--- |
| UR W24 |
Rev.5 Corr.1 |
Dec. 2024 |
Cast Copper Alloy Propellers |
--- |
| UR M86 |
New |
Nov. 2024 |
Monitoring and Safety Functions for Exhaust Gas Cleaning (SOx) Systems |
1 Jan. 2026 |
| UR M10 |
Rev.5 |
Nov. 2024 |
Protection of internal combustion engines against crankcase explosions |
1 Jan. 2026 |
| UR H1 |
New (Withdrawn) |
Jan. 2024 |
Control of Ammonia releases in Ammonia fuelled vessels |
Withdrawn in November 2024 |
| UR M85 |
New |
Nov. 2024 |
Type approval testing of synthetic materials for aftmost propeller shaft bearings |
1 Jan. 2026 |
| UR M52 |
Rev.3 |
Nov. 2024 |
Length of aftmost propeller shaft bearing |
1 Jan. 2026 |
| UR Z17 |
Rev.19 |
Oct. 2024 |
Procedural Requirements for Service Suppliers |
1 Jan. 2026 |
| UR P4 |
Rev.8 |
Sep. 2024 |
Production and Application of Plastic Piping Systems on Ships |
1 Jan. 2026 |
| UR S35 |
Corr.1 |
Sep. 2024 |
Buckling Strength Assessment of Ship Structural Elements |
--- |
| UR Z1 |
Rev.10 |
Sep. 2024 |
Annual and intermediate classification survey coverage of IMO Resolution A.1186(33) |
--- |
| UR M46 |
Rev.4 |
Aug. 2024 |
Ambient conditions – Inclinations and Ship Accelerations and Motions |
1 Jan. 2026 |
| UR E10 |
Rev.10 |
Aug. 2024 |
Test Specification for Type Approval |
1 Jan. 2026 |
| UR F44 |
Rev.3 |
Sep. 2024 |
Fore peak ballast tanks and space arrangements on oil & chemical tankers |
1 Jan. 2026 |
| UR Z7.1 |
Rev.15 Corr.1 |
May 2024 |
Hull Surveys for General Dry Cargo Ships |
--- |
| UR Z7 |
Rev.29 Corr.1 |
May 2024 |
Hull Classification Surveys |
--- |
| UR S10 |
Rev.7 Corr.2 |
May 2024 |
Rudders, Sole Pieces and Rudder Horns |
--- |
| UR C7 |
New |
May 2024 |
Approval and Certification of Container Securing Systems |
1 Jul. 2025 |
| UR C6 |
New |
May 2024 |
Requirements for Lashing Software |
1 Jul. 2025 |
| UR W8 |
Rev.4 |
Mar. 2024 |
Hull and machinery steel castings |
1 Jan. 2025 |
| UR E21 |
Rev.2 |
Feb. 2024 |
Requirements for uninterruptible power system (UPS) units |
1 Jul. 2025 |
| UR M61 |
Rev.3 |
Feb. 2024 |
Starting Arrangements of Internal Combustion Engines |
1 Jul. 2025 |
| UR M84 |
New |
Feb. 2024 |
Capacity and availability of compressed air for essential services |
1 Jul. 2025 |
| UR M47 |
Del. |
Feb. 2024 |
Bridge control of propulsion machinery for attended machinery spaces |
--- |
| UR M43 |
Rev.1 |
Feb. 2024 |
Bridge control of propulsion machinery |
1 Jan. 2025 |
| UR M3 |
Rev.7 |
Feb. 2024 |
Speed governor and overspeed protective device |
1 Jan. 2025 |
| UR M78 |
Rev.2 |
Jan. 2024 |
Reciprocating Internal Combustion Engines Fuelled by Natural Gas |
1 Jan. 2025 |
| Resolution |
Revision |
Adoption Date |
Title |
Implementation Date |
| UI SC140 |
Rev.4 |
Sep. 2025 |
Secondary Means of Venting Cargo Tanks |
1 Jan. 2026 |
| UI GF19 |
Rev.1 |
Jun. 2025 |
Fuel Supply to Consumers – single common flanges |
1 Jul. 2026 |
| UI SC76 |
Rev.1 |
Jun. 2025 |
Engine bearing temperature monitors or equivalent |
1 Jul. 2026 |
| UI SC310 |
New |
Jul. 2025 |
Unified Interpretations of SOLAS Regulation II-1/3-13.2.4 With Respect to a Factual Statement for Test and Thorough Examination of Non-Certified Lifting Appliances |
1 Jan. 2026 |
| UI SC308 |
Rev.5 (Withdrawn) |
Jul. 2025 |
Ventilation Systems of Cargo Spaces |
Withdrawn in July 2025 |
| UI SC271 |
Corr.1 |
Jun. 2025 |
Additional indicating unit in the cargo control room in accordance with amended FSS Code Chapter 9.2.5.1.6 |
--- |
| UI HSC11 |
New |
May 2025 |
Fire-Extinguishing Media Restrictions |
1 Jan. 2026 |
| UI SC309 |
New |
May 2025 |
Fire-Extinguishing Media Restrictions |
1 Jan. 2026 |
| UI GF22 |
New |
Mar. 2025 |
Gas Fuel Vent Pipes – Single walled construction in Machinery spaces |
1 Jul. 2026 |
| UI SC305 |
New |
Dec. 2024 |
Single essential propulsion components and their reliability |
1 Jan. 2026 |
| UI SC191 |
Rev.9 |
Nov. 2024 |
IACS Unified Interpretations (UI) SC 191 for the application of amended SOLAS regulation II-1/3-6 (resolution MSC.151(78)) and revised Technical provisions for means of access for inspections (resolution MSC.158(78)) |
1 Jul. 2025 |
| UI SC190 |
Rev.2 |
Nov. 2024 |
IACS Unified Interpretations (UI) SC 190 for Application of SOLAS Regulation II-1/3-6 (Res MSC.134(76)) and Technical Provisions on Permanent Means of Access (Res MSC.133(76)) |
1 Jul. 2025 |
| UI SC307 |
New |
Nov. 2024 |
Hydrocarbon Gas Detection and Bilge High Level Alarms in Cargo Pump-Rooms |
1 Jan. 2026 |
| UI SC306 |
New |
Nov. 2024 |
Valve piercing ship’s collision bulkhead |
1 Jan. 2026 |
| UI SC269 |
Rev.2 |
Nov. 2024 |
Means of escape from the steering gear space in cargo ships |
1 Jan. 2026 |
| UI SC11 |
Rev.2 |
Nov. 2024 |
Precautions against shock, fire and other hazards of electrical origin |
1 Jan. 2026 |
| UI SC5 |
Del |
Nov. 2024 |
Emergency source of electrical power in passenger ships |
--- |
| UI SC4 |
Del |
Nov. 2024 |
Emergency source of electrical power |
--- |
| UI GF21 |
New |
Oct. 2024 |
CO2 fire extinguishing systems in methyl/ethyl alcohol fuelled vessels machinery spaces |
1 Jan. 2026 |
| UI SC259 |
Rev.1 Corr.2 |
Oct. 2024 |
For Application of SOLAS Regulation II-1/3-11 Performance Standard for Protective Coatings for Cargo Oil Tanks of Crude Oil Tankers (PSPC-COT), adopted by Resolution MSC.288(87) |
--- |
| UI SC304 |
New |
Oct. 2024 |
Code on noise levels onboard ships - calibration of sound instruments |
1 Jul. 2026 |
| UI SC99 |
Rev.2 Corr.1 |
Sep. 2024 |
Flexible bellows of combustible materials |
--- |
| UI SC211 |
Rev.1 |
Sep. 2024 |
Protection of fuel oil tanks and designation of fore peak spaces |
1 Jan. 2026 |
| UI MPC131 |
New |
Jul. 2024 |
Unified Interpretation on the application of the amendments to Appendix IX of MARPOL Annex VI adopted by MEPC.385(81) |
1 Nov. 2024 |
| UI SC303 |
New |
Jul. 2024 |
Harmonization of Industrial Personnel Safety Certificate with SOLAS Safety Certificates |
1 Jul. 2025 |
| UI SC156 |
Rev.3 |
Jul. 2024 |
Doors in watertight bulkheads of cargo ships and passenger ships |
1 Jul. 2025 |
| UI GF20 |
New |
Jun. 2024 |
Arrangements of fuel tanks in methyl/ethyl alcohol fuelled vessels |
1 Jul. 2025 |
| UI SC302 |
New |
May 2024 |
Interpretation of SOLAS Regulation II-2/11.4.1 Pertaining to Crowns of Machinery Spaces of Category A
|
1 Jul. 2025 |
| UI LL62 |
Rev.1 Corr.2 |
Jun. 2024 |
Side Scuttles, Windows and Skylights |
--- |
| UI SC277 |
Rev.1 |
May 2024 |
Escape from machinery spaces on cargo ships |
1 Jul. 2025 |
| UI SC276 |
Rev.1 |
May 2024 |
Escape from machinery spaces on passenger ships |
1 Jul. 2025 |
| UI SC301 |
New |
May 2024 |
SOLAS Regulations II-2/9.7.2 and 9.7.5.1 – Separation of ducts from spaces |
1 Jul. 2025 |
| UI SC266 |
Del. |
Feb. 2024 |
Revised guidelines for cargo securing manual and code of safe practice for cargo stowage and securing– scope of application |
--- |
| UI SC249 |
Rev.2 |
Jan. 2024 |
Implementation of SOLAS II-1, Regulation 3-5 and MSC.1/Circ.1379 |
1 Jan. 2025 |
