Unified Requirements are adopted resolutions on matters directly connected to or covered by specific Rule requirements and practices of classification societies and the general philosophy on which the rules and practices of classification societies are established.
Subject to ratification by the governing body of each Member Society, Unified Requirements shall be incorporated in the Rules and practices of the Member Societies, within one year of approval by the IACS General Policy Group.
The existence of a UR does not oblige a Member Society to issue respective Rules if it chooses not to have Rules for the type of ship or marine structure concerned.
Unified Requirements are minimum requirements. Each Member remains free to set more stringent requirements.
The technical backgrounds (development histories) of Unified Requirements since 1999 can be found by following this link.
A list of the IACS working groups responsible for each Unified Requirement may be found here.
UR W31 Rev1 CLN
UR W32 New
UR W32 Qualification scheme for welders of hull structural steels - Sept 2016
Note: UR W32 will come into force on 1 January 2018.
Survey and Certification
UR Z1 Rev6 CLN
UR Z2 Deleted
Deleted 1994 - superseded by Z10.1
UR Z3 Rev6 CLN
UR Z4 Deleted
Surveys of hatch covers and coamings - Deleted May 2013
UR Z5 Deleted
Deleted - Re-categorised as Recommendation No.59 (May 1999)
UR Z6 Rev6 CLN
UR Z7 Rev25 CLN
UR Z7.1 Rev12 CLN
UR Z7.2 Rev6 CLN
UR Z8 Rev1 CLN
UR Z8 Corrosion protection coating for salt water ballast spaces - Rev.1 1995
UR Z9 Rev2 CLN
Corrosion protection coatings for cargo hold spaces on bulk carriers - Rev.2 1996
UR Z10.1 Rev22 CLN
UR Z10.2 Rev32 CLN
UR Z10.3 Rev17 CLN
UR Z10.4 Rev13 CLN
UR Z10.5 Rev15 CLN
UR Z10.5 Hull surveys of double skin bulk carriers - Rev.15 Feb 2015 Clean.
Note: UR Z10.5 Rev 16 will come into force on 1 January 2018 and can be found in "Previous Revisions"
Note: UR Z10.5 Rev 17 will come into force on 1 January 2019 and can be found in "Previous Revisions"
UR Z10.6 Deleted
Re-categorized as UR Z7.1 (June 2003)