For the carriage of fuel gas containment systems designed and approved to be fitted in motor vehicles containing this gas the provisions of 4.1.4.1 and Chapter 6.2 of ADR need not be applied when carried for disposal, recycling, repair, inspection, maintenance or from where they are manufactured to a vehicle assembly plant, provided the following conditions are met:

(a) The fuel gas containment systems shall meet the requirements of the standards or regulations for fuel tanks for vehicles, as applicable. Examples of applicable standards and regulations are:

+--------------------------------------------------------------------+
| LPG tanks                                                          |
+-----------------------+--------------------------------------------+
| UN Regulation No. 67  | Uniform provisions concerning:             |
| Revision 2            |  I. Approval of specific equipment of      |
|                       |     vehicles of category M and N using     |
|                       |     liquefied petroleum gases in their     |
|                       |     propulsion system;                     |
|                       | II. Approval of vehicles of category M and |
|                       |     N fitted with specific equipment for   |
|                       |     the use of liquefied petroleum gases   |
|                       |     in their propulsion system with regard |
|                       |     to the installation of such equipment  |
+-----------------------+--------------------------------------------+
| UN Regulation No. 115 | Uniform provisions concerning the approval |
|                       | of:                                        |
|                       |  I. Specific LPG (liquefied petroleum      |
|                       |     gases) retrofit systems to be in-      |
|                       |     stalled in motor vehicles for the use  |
|                       |     of LPG in their propulsion systems;    |
|                       | II. Specific CNG (compressed natural gas)  |
|                       |     retrofit systems to be installed in    |
|                       |     motor vehicles for the use of CNG in   |
|                       |     their propulsion system                |
+-----------------------+--------------------------------------------+
| CNG and LNG tanks                                                  |
+-----------------------+--------------------------------------------+
| UN Regulation No. 110 | Uniform provisions concerning the approval |
|                       | of:                                        |
|                       |  I. Specific components of motor vehicles  |
|                       |     using compressed natural gas (CNG)     |
|                       |     and/or liquefied natural gas (LNG) in  |
|                       |     their propulsion system                |
|                       | II. Vehicles with regard to the installa-  |
|                       |     tion of specific components of an      |
|                       |     approved type for the use of com-      |
|                       |     pressed natural gas (CNG) and/or       |
|                       |     liquefied natural gas (LNG) in their   |
|                       |     propulsion system                      |
+-----------------------+--------------------------------------------+
| UN Regulation No. 115 | Uniform provisions concerning the approval |
|                       | of:                                        |
|                       |  I. Specific LPG (liquefied petroleum      |
|                       |     gases) retrofit systems to be          |
|                       |     installed in motor vehicles for the    |
|                       |     use of LPG in their propulsion systems;|
|                       | II. Specific CNG (compressed natural gas)  |
|                       |     retrofit systems to be installed in    |
|                       |     motor vehicles for the use of CNG in   |
|                       |     their propulsion system                |
+-----------------------+--------------------------------------------+
| ISO 11439:2013        | Gas cylinders - High pressure cylinders    |
|                       | for the on-board storage of natural gas as |
|                       | a fuel for automotive vehicles             |
+-----------------------+--------------------------------------------+
| ISO 15500-Series      | Road vehicles - Compressed natural gas     |
|                       | (CNG) fuel system components - several     |
|                       | parts as applicable                        |
+-----------------------+--------------------------------------------+
| ANSI NGV 2            | Compressed natural gas vehicle fuel con-   |
|                       | tainers                                    |
+-----------------------+--------------------------------------------+
| CSA B51 Part 2:2014   | Boiler, pressure vessel, and pressure      |
|                       | piping code Part 2 Requirements for high-  |
|                       | pressure cylinders for on-board storage of |
|                       | fuels for automotive vehicles              |
+-----------------------+--------------------------------------------+
| Hydrogen pressure tanks                                            |
+-----------------------+--------------------------------------------+
| Global Technical      | Global technical regulation on hydrogen    |
| Regulation (GTR)      | and fuel cell vehicles                     |
| No. 13                | (ECE/TRANS/180/Add.13)                     |
+-----------------------+--------------------------------------------+
| ISO/TS 15869:2009     | Gaseous hydrogen and hydrogen blends -     |
|                       | Land vehicle fuel tanks                    |
+-----------------------+--------------------------------------------+
| Regulation (EC)       | Regulation (EC) No. 79/2009 of the Euro-   |
| No. 79/2009           | pean Parliament and of the Council of      |
|                       | 14 January 2009 on type approval of        |
|                       | hydrogen-powered motor vehicles, and       |
|                       | amending Directive 2007/46/EC              |
+-----------------------+--------------------------------------------+
| Regulation (EU)       | Commission Regulation (EU) No. 406/2010 of |
| No. 406/2010          | 26 April 2010 implementing Regulation (EC) |
|                       | No. 79/2009 of the European Parliament and |
|                       | of the Council on type-approval of         |
|                       | hydrogen-powered motor vehicles            |
+-----------------------+--------------------------------------------+
| UN Regulation No. 134 | Uniform provisions concerning the approval |
|                       | of motor vehicles and their components     |
|                       | with regard to the safety-related per-     |
|                       | formance of hydrogen-fuelled vehicles      |
|                       | (HFCV)                                     |
+-----------------------+--------------------------------------------+
| CSA B51 Part 2: 2014  | Boiler, pressure vessel, and pressure      |
|                       | piping code - Part 2: Requirements for     |
|                       | high-pressure cylinders for on-board       |
|                       | storage of fuels for automotive vehicles   |
+-----------------------+--------------------------------------------+

Gas tanks designed and constructed in accordance with previous versions of relevant standards or regulations for gas tanks for motor vehicles, which were applicable at the time of the certification of the vehicles for which the gas tanks were designed and constructed may continue to be carried;

(b) The fuel gas containment systems shall be leakproof and shall not exhibit any signs of external damage which may affect their safety;

NOTE 1: Criteria may be found in standard ISO 11623:2015 Gas cylinders - Composite construction - Periodic inspection and testing of composite gas cylinders (or ISO 19078:2013 Gas cylinders - Inspection of the cylinder installation, and requalification of high pressure cylinders for the on-board storage of natural gas as a fuel for automotive vehicles).

NOTE 2: If the fuel gas containment systems are not leakproof or are overfilled or if they exhibit damage that could affect their safety (e.g. in case of a safety related recall), they shall only be carried in salvage pressure receptacles in conformity with ADN.

(c) If a fuel gas containment system is equipped with two valves or more integrated in line, the two valves shall be closed as to be gastight under normal conditions of carriage. If only one valve exists or only one valve works, all openings with the exception of the opening of the pressure relief device shall be closed as to be gastight under normal conditions of carriage;

(d) Fuel gas containment systems shall be carried in such a way as to prevent obstruction of the pressure relief device or any damage to the valves and any other pressurised part of the fuel gas containment systems and unintentional release of the gas under normal conditions of carriage. The fuel gas containment system shall be secured in order to prevent slipping, rolling or vertical movement;

(e) Valves shall be protected by one of the methods described in 4.1.6.8 (a) to (e) of ADR;

(f) Except for the case of fuel gas containment systems removed for disposal, recycling, repair, inspection or maintenance, they shall be filled with not more than 20% of their nominal filling ratio or nominal working pressure, as applicable;

(g) Notwithstanding the provisions of Chapter 5.2, when fuel gas containment systems are consigned in a handling device, marks and labels may be affixed to the handling device; and

(h) Notwithstanding the provisions of 5.4.1.1.1 (f) the information on the total quantity of dangerous goods may be replaced by the following information:
  (i) The number of fuel gas containment systems; and
 (ii) In the case of liquefied gases the total net mass (kg) of gas of each fuel gas containment system and, in the case of compressed gases, the total water capacity (l) of each fuel gas containment system followed by the nominal working pressure. 

  Examples for information in the transport document:

  Example 1: "UN 1971 natural gas, compressed, 2.1, 1 fuel gas containment system of 50 l in total, 200 bar".

  Example 2: "UN 1965 hydrocarbon gas mixture, liquefied, n.o.s., 2.1, 3 fuel gas containment systems, each of 15 kg net mass of gas".