This substance may be carried in tank-wagons or tank-containers under the conditions laid down by the competent authority of the country of origin, if, on the basis of the tests mentioned below, the competent authority is satisfied that such a transport operation can be carried out safely.

If the country of origin is not a COTIF Member State, these conditions shall be recognized by the competent
authority of the first COTIF Member State reached by the consignment.

For the type approval tests shall be undertaken:
- to prove the compatibility of all materials normally in contact with the substance during carriage;
- to provide data to facilitate the design of the emergency pressure-relief devices and safety valves taking into account the design characteristics of the tank; and
- to establish any special requirements necessary for the safe carriage of the substance. 

The test results shall be included in the report for the type approval.