travel requirement

This is a compositional phrase, not a term of art. In authority documents such as NIST SP 800-53, it appears in supplemental guidance as an ordinary English description of an operational circumstance — specifically, a practical need arising from an employee or user traveling — used to justify or explain a particular account attribute, access permission, or system configuration (for example, enabling a temporary account or remote-access credential). NIST SP 800-53 Rev. 4 notes that account attributes and conditions of use reflect both "system-related requirements" and "mission/business" considerations, within which physical travel situations fall as one illustrative case. The phrase carries no standardized technical definition of its own; its meaning in any given passage is fully determined by its ordinary constituent words in context.