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 GC19 New

UI GC19 External surface area of the tank for determining sizing of pressure relief valve (paragraph 8.4.1.2 and figure 8.1) New Aug 2017.

Note: UI GC19 will come into force on 1 January 2018

UI GF

Interpretations of the IGF Code

UI GF1 New

UI GF1 - Test for gas fuel tank’s high level alarm - New January 2017. Implementation date 1 January 2018.

Note: UI GF1 Rev.1 will come into force on 1 July 2018 and can be found in "Previous Revisions" 

UI HSC

High Speed Craft Code

UI HSC1 New

UI HSC1 New 1996

UI HSC2 New

UI HSC2 New 1996

UI HSC3 New

UI HSC3 New 1996

UI HSC4 New

UI HSC4 New 1997

UI HSC5 New

UI HSC5 New 1997

UI HSC6 New

UI HSC6 New 1997

UI HSC7 Rev1 CLN

UI HSC8 New

UI HSC8 New July 2012

UI HSC9 Corr1 CLN

UI HSC9 Corr.1 January 2014 Clean

UI HSC10 New

UI HSC10 New May 2016

UI LL

Load Line Convention

UI LL1 Rev1 CLN

UI LL1 Application (Article (4)) - Rev.1 July 2008

UI LL2 Rev1 CLN

UI LL2 Depth for freeboard (Regulation 3(6)) - Rev.1 July 2008

UI LL3 Rev1 CLN

UI LL3 Superstructure (Regulation 3 (10)(b)) - Rev.1 July 2008

UI LL4 Rev1 CLN

UI LL4 Details of marking (Regulation 8) - Rev.1 July 2008

UI LL5 Rev1 CLN

UI LL5 Doors (Regulation 12) - Rev.1 July 2008 Clean

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