Only substances which are not to be carried at a specific ambient temperature may be forwarded as express parcels. In this case, the following quantity limits shall apply:

- for substances other than those assigned to UN No. 3373 up to 50 ml per package for liquids and up to 50 g per package for solids.
- for substances assigned to UN No. 3373 in quantities as specified in packing instruction P650 in 4.1.4.1.
- for body parts or organs, a package shall not weigh more than 50 kg.