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 MPC64 New

UI MPC64 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 5.6 Permissible deviations of instruments for engine-related parameters and other essential parameters - July 2004

UI MPC65 New

UI MPC65 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 5.9.1.2 - July 2004

UI MPC66 Rev1 CLN

UI MPC66 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 5.9.2 - March 2006

UI MPC67 New

UI MPC67 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 5.9.2.3 - July 2004

UI MPC68 New

UI MPC68 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 5.9.3.1 - July 2004

UI MPC69 New

UI MPC69 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 5.9.3.2  - July 2004

UI MPC70 New

UI MPC70 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 5.9.6.1 - July 2004

UI MPC71 New

UI MPC71 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 5.9.6.2 July 2004

UI MPC72 Rev1 CLN

UI MPC72 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 5.9.7 - March 2006

UI MPC73 New

UI MPC73 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 5.9.9 - July 2004

UI MPC74 New

UI MPC74 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 5.10.1 - July 2004

UI MPC75 New

UI MPC75 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 5.11 Data evaluation for gaseous emissions - July 2004

UI MPC76 New

UI MPC76 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 5.12.4.1 - July 2004

UI MPC77 New

UI MPC77 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 6.2.1.2  - July 2004

UI MPC78 Rev1 CLN

UI MPC78 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 6.2.3.4.2 - March 2006

UI MPC79 Rev1 CLN

UI MPC79 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 6.2.3.5 - March 2006

UI MPC80 Rev1 CLN

UI MPC80 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Appendix 4 Calibration of the analytical instruments (Refer to chapter 5 of the NOx Technical Code) - Rev.1 March 2006

UI MPC81 New

UI MPC81 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Appendix 4 Calibration of the analytical instruments (Refer to chapter 5 of the NOx Technical Code) - July 2004

UI MPC82 Deleted

UI MPC82 Regulation 14, Annex VI of MARPOL 73/78 Regulation 14 Deleted Nov 2013

UI MPC83 Deleted

UI MPC83 Regulation 18, Annex VI of MARPOL 73/78 Regulation 18 Deleted Nov 2013

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