Unified Interpretations

Definition

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.

Foreword

  1. 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.
  2. 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.
  3. 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.
  4. 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 MPC125 New

UI MPC125 Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines (NOx Technical Code 2008, Chapter 4, Paragraph 4.4.6.1) - November 2015

UI MPC126 New

UI MPC126 Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines (NOx Technical Code 2008, Chapter 4, Paragraph 4.4.6.2) - November 2015

UI MPC127 New

UI MPC127 Annex I of MARPOL 73/78 Regulation 14.7 - February 2016

UI MPC128 New

UI MPC128 Inclusion of mediums of the fire-fighting systems in lightweight (MARPOL Annex I/Regulation 1.24) - May 2016

UI MPC129 New

UI MPC129 Unprotected openings - June 2016

UI PASSUB

Passenger Submersible Craft

UI PASSUB1 Rev1 CLN

UI PASSUB1 Viewports in Passenger Submersible Craft (para. 2.2.3, IMO Guidelines for Design, Construction and Operation of Passenger Submersible Craft, 2000) - Rev.1 August 2000

UI SC

SOLAS

UI SC1 Rev1 CLN

UI SC1 Main source of electrical power Shaft driven generator systems (Regulation II-1/41.1.3) - Rev.1 June 2002

UI SC2 Deleted

UI SC2 Main source of electrical power Deleted in 2003

UI SC3 Rev1 CLN

UI SC3 Emergency source of electrical power (Chapter II-1, Regulation 42.1.4 & 43.1.4) - Rev.1 May 1999

UI SC4 New

UI SC4 Emergency source of electrical power (Chapter II-1, Regulation 42.2.3.1 & 43.2.4.1)

UI SC5 New

UI SC5 Emergency source of electrical power in passenger ships (Chapter II-1, Regulation 42.2.3.1 only)

UI SC6 New

UI SC6 Emergency source of electrical power in cargo ships (Chapter II-1, Regulation 43.6)

UI SC7 New

UI SC7 Precautions against shock, fire and other hazards of electrical origin (Chapter II-1, Regulation 45.2)

UI SC8 New

UI SC8 Precautions against shock, fire and other hazards of electrical origin (Chapter II-1, Regulation 45.3.3)

UI SC9 New

UI SC9 Precautions against shock, fire and other hazards of electrical origin (Chapter II-1, Regulation 45.4.2)

UI SC10 Rev2 CLN

UI SC10 Precautions against shock, fire and other hazards of electrical origin (Chapter II-1, Regulation 45.5.2) - Rev.2 May 2001

UI SC11 New

UI SC11 Precautions against shock, fire and other hazards of electrical origin (Chapter II-1, Regulation 45.5.3) - 1985

UI SC12 New

UI SC12 Precautions against shock, fire and other hazards of electrical origin (Chapter II-1, Regulation 45.5.4) - 1985

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