What does "upgrading" refer to in classification processes?

In the context of classification processes, "upgrading" specifically refers to raising the classification level of a document or information. This action might occur when new information is discovered, or when the context surrounding existing information changes, necessitating a higher level of protection to ensure that sensitive details remain secure. For instance, if information previously deemed unclassified is later determined to require a higher level of confidentiality due to its sensitivity or potential impact, the classification would be upgraded accordingly. This ensures that all handling procedures align with the new, more stringent requirements for classified information.