UR Z13 Rev3 CLN
UR Z13 Voyage repairs and maintenance - Rev.3 Jan 2011
UR Z15 Rev1 Corr1 CLN
UR Z15 Hull, structure, equipment and machinery surveys of mobile offshore drilling units - Rev.1 Corr.1 Oct 2016
UR Z16 Rev4 CLN
UR Z16 Periodical surveys of cargo installations on ships carrying liquefied gases in bulk Rev.4 Oct 2013
UR Z17 Rev12 CLN
UR Z17 Procedural requirements for service suppliers - Rev.12 Nov 2016 Clean.
Note: UR Z17 Rev 13 will come into force on 1 January 2019 and can be found in "Previous Revisions"
UR Z18 Rev6 CLN
UR Z18 Periodical survey of machinery - Rev.6 Aug 2016. Implementation date 1 July 2017.
UR Z18 Rev 7 will come into force on 1 July 2018 and can be found in "Previous Revisions"
UR Z19 New
UR Z19 Calibration of measuring equipment - April 1999
UR Z20 New
UR Z20 Planned maintenance scheme (PMS) for machinery - May 2001
UR Z21 Rev4 CLN
UR Z21 Surveys of propeller shafts and tube shafts - Rev.4 Oct 2015
UR Z22 Deleted
Survey requirements for automatic air pipe heads - Deleted July 2014
UR Z23 Rev6 CLN
UR Z23 Hull survey for new construction - Rev.6 Nov 2016 Clean.
UR Z24 Corr1 CLN
UR Z24 Survey requirements for shell and inner doors of ro-ro ships - Corr.1 July 2011
UR Z25 New
UR Z25 Periodic Survey of Fuel Installations on Ships other than Liquefied Gas Carriers utilizing gas or other low flash point fuels - Jan 2017.
Note: UR Z25 Rev 1 will come into force on 1 January 2019 and can be found in "Previous Revisions"
UR Z26 New
UR Z26 Alternative Certification Scheme (ACS) - Feb 2015