Unified Interpretations are adopted resolutions on matters arising from implementing the requirements of IMO Conventions or Recommendations. Such adopted resolutions can involve uniform interpretations of Convention Regulations or IMO Resolutions on those matters which in the Convention are left to the satisfaction of the Administration or vaguely worded.
Interpretations are circulated to Administrations concerned or are sent to IMO for information, as appropriate.
- IACS, as an international Non-Governmental Organization having observer status at IMO, works in co-operation with IMO in order to endeavour that regulations developed at IMO are clear, unambiguous and can easily be applied without the need of interpretations.
- However, interpretations may still be needed in cases where IMO regulations contain only functional requirements, allow alternative solutions to prescriptive requirements, are left to the satisfaction of Administrations or are generally or vaguely worded.
- The following Unified Interpretations (UIs) have been developed by IACS to assist the unified implementation of IMO regulations falling in the above-mentioned cases. It should be noted that the development of IACS Unified Interpretations (UIs) is not aiming at introducing additional requirements but at achieving uniform application of IMO regulations.
- IACS UIs are to be applied by IACS Societies to ships whose flag Administrations have not issued definite instructions on the interpretation of the IMO regulations concerned, in the course of statutory certification on behalf of those flag Administrations.
The technical backgrounds (development histories) of Unified Interpretations since 2004 can be found by following this link.
A list of the IACS working groups responsible for each Unified Interpretation may be found here.
UI FTP6 Rev1 CLN
Liquified Gases in Bulk
UI GC1 Deleted
UI GC1 Deleted
UI GC2 New
UI GC2 Interpretation of the second sentence of paragraph 13.2.1 - 1977
UI GC3 Deleted
UI GC3 Deleted 1997
UI GC4 Deleted
UI GC4 Deleted 1997
UI GC5 Rev1 CLN
UI GC7 Rev1 CLN
UI GC8 Rev1 CLN
UI GC9 New
UI GC9 Guidance for sizing pressure relief systems for interbarrier spaces - 1988
UI GC10 New
UI GC10 Reliquefaction plant of moter-driven LNGcarriers - 1988
UI GC11 Rev1 CLN
UI GC12 Rev2 CLN
UI GC13 Rev1 CLN
UI GC14 New
UI GC14 Pump Vents in Machinery Spaces (IGC Code Chapters 3.7.4 as amended by Res. MSC. 103(73) and IGC Code Chapters 3.7.5 as amended by Res. MSC. 370(93)) - April 2015
UI GC15 New
UI GC16 New
UI GC16 Cargo tank clearances (on ships constructed on or after 1 July 2016) - March 2016
UI GC17 New
UI GC17 Unprotected openings - June 2016