This standard describe the use of Code 128 linear bar codes to convey postal information, other than 13-character item identifiers that comply with UPU standard S10[3], in the form of symbols printed on postal items, on item or receptacle labels and on accompanying documentation. It recommends the physical parameters, orientation and placement of linear bar codes required to ensure a high level of readability in the postal processing environment.
UPU S46-2009 history
2009UPU S46-2009 Linear Bar Coded Representation of Data on Postal Items, Labels and Forms