Marking gas cylinders for transportation

A temporary exemption, valid until 30 June 2018, regarding UN numbers marked on gas cylinders which are being used to transport dangerous goods (ADR M273).


Multilateral agreement M273

This file may not be suitable for users of assistive technology. Request an accessible format.

If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email Please tell us what format you need. It will help us if you say what assistive technology you use.


This multilateral agreement (MA), signed by the UK, gives a temporary exemption to certain parts of the European Agreement concerning the International Carriage of Dangerous Goods by Road (ADR).

This exemption relates to marking UN numbers on gas cylinders.

It is valid until 30 June 2018 unless otherwise revoked.

Anyone carrying dangerous goods in line with an MA must have a copy of it on their vehicle.

See other temporary exemptions.

Published 15 July 2014