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 SC53 Deleted
UI SC53 Special requirements for ships carrying dangerous goods (Chapter II-2, Regulation 54.2.5) (Cancelled at C27, 8-9 June 1993)
UI SC54 Rev3 CLN
UI SC54 Location and separation of spaces (Reg. II-2/4.5.1) - Rev.3 Nov 2005
UI SC55 Rev2 CLN
UI SC55 Location and separation of spaces (Reg. II-2/22.214.171.124) - Rev.2 Nov 2005
UI SC56 Deleted
UI SC56 Venting, purging, gas freeing and ventilation Deleted in Nov 2005 because of SOLAS 2000 Amendments.
UI SC57 Rev1 CLN
UI SC57 Venting, purging, gas freeing and ventilation (Reg. II-2/126.96.36.199.1.3 and 188.8.131.52.1.4) - Rev.1 Nov 2005
UI SC58 Rev2 CLN
UI SC58 Venting, purging, gas freeing and ventilation (Reg. II-2/184.108.40.206) - Rev.2 Nov 2005
UI SC59 Deleted
UI SC590 Cargo tank protection Deleted in Nov 2005 because of SOLAS 2000 Amendments.
UI SC60 Rev1 CLN
UI SC60 Fixed deck foam systems (FSS Code; Ch. 14, 220.127.116.11) - Rev.1 Nov 2005
UI SC61 Rev2 CLN
UI SC61 Fixed deck foam systems (FSS Code, Ch. 14, 2.1.3) - Rev.2 Nov 2005
UI SC62 Rev1 CLN
UI SC62 Inert gas systems (FSS Code, Ch. 15, 18.104.22.168 and 22.214.171.124) - Rev.1 Nov 2005
UI SC63 Rev2 CLN
UI SC63 Pre-discharge alarm of fixed gas fire extinguishing systems (FSS Code, Ch. 5, 126.96.36.199) - Rev.2 Nov 2005
UI SC64 Rev1 CLN
UI SC64 Fire dampers in ventilation ducts (Reg. II-2/188.8.131.52) - Rev.1 Nov 2005
UI SC65 Deleted
UI SC65 Ventilation ducts for galley Deleted in Nov 2005 because of SOLAS 2000 Amendments. - Rev.1 2001
UI SC66 Deleted
UI SC66 Integrity of emergency generator space Deleted in Nov 2005 because of SOLAS 2000 Amendments.
UI SC67 Deleted
UI SC67 Doors in fire-resisting corridor bulkheads of cargo ships Deleted in Nov 2005 because of SOLAS 2000 Amendments.
UI SC68 Deleted
UI SC68 Cofferdams adjacent to slop tanks of combination carriers Deleted in Nov 2005 because of SOLAS 2000 Amendments.
UI SC69 Deleted
UI SC69 Arrangement for pumping of slops in combination carriers in dry cargo mode Deleted in Nov 2005 because of SOLAS 2000 Amendments.
UI SC70 Rev3 CLN
UI SC71 Deleted
UI SC71 Tank level gauging systems Deleted in Nov 2005 because of SOLAS 2000 Amendments.
UI SC72 Rev1 CLN
UI SC72 In a ship engaged regularly in voyages of short duration (Chapter II-1, Regulation 42.2.7, 184.108.40.206 ) - Rev.1 Nov 2005