The article divides the conduct. Producing a forged official document that grants rights or releases from obligations, or forging a stamp or seal, is the more serious limb and carries up to two years — up to four where it is done to conceal or facilitate another offence. Acquiring, storing, transporting for use, or using a knowingly forged passport or identity document forms its own part, with up to a year. Simply using a knowingly forged document is the least serious limb and does not carry imprisonment at all.
Establishing which limb applies is the first task in these cases, and investigators do not always get it right. The difference between "he made it" and "he was given it" is the difference between a custodial sentence and a fine.