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 MPC44 New

UI MPC44 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 2.4.1.5 - July 2004

UI MPC45 New

UI MPC45 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 2.4.1.7 - July 2004

UI MPC46 New

UI MPC46 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 2.4.2  - July 2004

UI MPC47 New

UI MPC47 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 2.4.4.3 - July 2004

UI MPC48 New

UI MPC48 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 2.4.5 - July 2004

UI MPC49 New

UI MPC49 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 3.1.1 - July 2004

UI MPC50 New

UI MPC50 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 3.1.3 - July 2004

UI MPC51 New

UI MPC51 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Paragraph 3.2.1, Chapter 3 of NOx Technical Code (NTC) 2008 -New July 2004

Note: UI MPC51 Rev 1 will come into force on 1 July 2018 and can be found in "Previous Revisions" 

UI MPC52 New

UI MPC52 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 3.2.3 - July 2004

UI MPC53 New

UI MPC53 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 4.1.1 Chapter 4.1.2 Chapter 4.1.3 Chapter 4.1.4 - July 2004

UI MPC54 New

UI MPC54 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 4.3.1 Chapter 4.4.1 - July 2004

UI MPC55 New

UI MPC55 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 4.3.7 Chapter 4.3.10.6 Chapter 4.4.8 - July 2004

UI MPC56 New

UI MPC56 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 4.3.9.1 Chapter 4.4.7 - July 2004

UI MPC57 New

UI MPC57 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 4.3.9.2 - July 2004

UI MPC58 New

UI MPC58 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 4.3.10.2 Chapter 4.3.10.3 - July 2004

UI MPC59 New

UI MPC59 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 4.4.5.2 Chapter 4.4.5.3 - July 2004

UI MPC60 New

UI MPC60 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 5.2.2.2  - July 2004

UI MPC61 New

UI MPC61 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 5.2.5 - July 2004

UI MPC62 Rev1 CLN

UI MPC62 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 5.4.2 - Rev.1 March 2006 Clean

UI MPC63 New

UI MPC63 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 5.5.3 - July 2004

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