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 SC93 Rev1 CLN
UI SC94 Rev2 CLN
UI SC95 New
UI SC95 Communication between Navigating Bridge and Machinery Space (Chapter II-1, Reg. 37) - 1994
UI SC96 Deleted
UI SC96 Capacity of an emergency fire pump Deleted in Nov 2005 because of SOLAS 2000 Amendments
UI SC97 Rev2 CLN
UI SC97 Connection of a pump to fire main (Reg. II-2/10.2.2.3.3) - Rev.2 Nov 2005
UI SC98 Rev1 CLN
UI SC98 Fire hose nozzles of a plastic type material (Reg. II-2/10.2.3.3) - Rev.1 Nov 2005
UI SC99 Rev2 CLN
UI SC101 Rev1 CLN
UI SC101 Main vertical zones (Reg. II-2/188.8.131.52) - Rev.1 November 2005 Clean
UI SC102 Rev1 CLN
UI SC102 Cold Service (Reg. II-2/184.108.40.206) - Rev.1 November 2005 Clean
UI SC103 Rev1 CLN
UI SC103 Insulation of machinery space boundaries (Reg. II-2/19.3.8) - Rev.1 November 2005 Clean
UI SC104 Deleted
UI SC104 Quick closing valve for emergency generator fuel tank Deleted in Nov 2005 because of SOLAS 2000 Amendments
UI SC105 Deleted
UI SC105 Relief valve in oil filling lines and safe positions for discharge of air and overflow pipes Deleted in Nov 2005 because of SOLAS 2000 Amendments.
UI SC106 Rev1 CLN
UI SC106 Galley exhaust duct (Reg. II-2/220.127.116.11.1) - Rev.1 Nov 2005 Clean
UI SC107 Rev1 CLN
UI SC107 Continuous ceiling (Reg. II-2/18.104.22.168.3) - Rev.1 Nov 2005 Clean
UI SC108 Rev1 CLN
UI SC108 Galley exhaust duct (Reg. II-2/22.214.171.124) - Rev.1 Nov 2005
UI SC109 Rev1 CLN
UI SC109 Open Top Container Holds - Water Supplies (Reg. II-2/19.3.1) - Rev.1 Nov 2005
UI SC110 Rev1 CLN
UI SC110 Open Top Container Holds - Ventilation (Reg. II-2/19.3.4) - Rev.1 November 2005
UI SC111 Rev1 CLN
UI SC111 Open Top Container Holds - Bilge Pumping (Reg. II-2/19.3.5) - Rev.1 Nov 2005
UI SC112 Deleted
UI SC112 Pilot Transfer Arrangements Deleted in January 2002.