2. The use of materials and particularly of paper or stamps bearing trade specifications is allowed provided that the printing or labelling has been done with a non-toxic ink or glue.
1. Each package must bear the following particulars in letters grouped on the same side, legibly and indelibly marked and visible from the outside ... Commercial specifications
- Class.
- When sized, size expressed as minimum and maximum diameters or, alternatively, the word 'unsized'.
