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 MPC24 Deleted

UI MPC24 Annex VI of MARPOL 73/78 Regulation 14 (6) Deleted Nov 2013.

UI MPC25 Deleted

UI MPC25 Annex VI of MARPOL 73/78 Regulation 16 (2) (a) Deleted Nov 2013.

UI MPC26 Deleted

UI MPC26 Annex VI of MARPOL 73/78 Regulation 16 (6) Deleted Nov 2013.

UI MPC27 Deleted

UI MPC27 Annex VI of MARPOL 73/78 Regulation 16 (7) Deleted Nov 2013.

UI MPC28 Deleted

UI MPC28 Annex VI of MARPOL 73/78 Deleted in Dec. 2005

UI MPC29 Rev1 CLN

UI MPC29 Annex VI of MARPOL 73/78 Regulations 18.5 and 18.6 - Rev.1 April 2014 Clean

UI MPC30 New

UI MPC30 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines - July 2004

UI MPC31 New

UI MPC31 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines - July 2004

UI MPC32 New

UI MPC32 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines - July 2004

UI MPC33 Rev1 CLN

UI MPC33 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines - Rev.1 March 2006

UI MPC34 New

UI MPC34 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 2.2.5 - July 2004

UI MPC35 Rev1 CLN

UI MPC35 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 2.2.8 - Rev.1 March 2006

UI MPC36 New

UI MPC36 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 2.2.9 - July 2004

UI MPC37 New

UI MPC37 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines - July 2004

UI MPC38 New

UI MPC38 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines - July 2004

UI MPC39 Rev1 CLN

UI MPC39 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 2.3.6  - Rev.1 March 2006

UI MPC40 New

UI MPC40 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 2.3.11 - July 2004

UI MPC41 New

UI MPC41 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 2.3.12 - July 2004

UI MPC42 Rev1 CLN

UI MPC42 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 2.3.13 - Rev.1 March 2006

UI MPC43 Rev1 CLN

UI MPC43 Resolution 2 of the 1997 MARPOL Conference Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines Chapter 2.4.1.1  - Rev.1 March 2006

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