It is quite possible, and not uncommon, for data within an OFFICIAL classification to have serious impacts including serious injury in the event of unauthorised disclosure. This is one of the characteristics of the GSCP which differs significantly from the Protective Marking Scheme which it replaced. At the OFFICIAL classification there is a general presumption that data may be shared across Government, however where a need to know principle is identified data may be marked as "OFFICIAL-SENSITIVE"; "OFFICIAL-SENSITIVE COMMERCIAL"; "OFFICIAL-SENSITIVE LOCSEN" or "OFFICIAL-SENSITIVE PERSONAL".