The gross mass of the CTU needs to be verified before any transport operation
commences. Incorrect gross masses are a hazard for any mode of transport.
Therefore, the gross mass verification should be carried out before the unit
leaves the premises of the packer. If a certain transport mode deems it
necessary that a reverification has to take place when the CTU is
transferred from one mode to another, this is beyond the scope of this Code
and may be regulated in the regulations of that mode. Where a cargo is to be
transported by road or rail only, the packer need only provide the mass of
the cargo and any packing and securing material to the carrier when the tare
of the transport vehicle is not known.