1. A computer-implemented system for defining and justifying policy requirements, comprising: a hierarchical regional mapping (HRM) module that provides: a common language, common among geography and different jurisdictions, and a hierarchical model applied to both said geography and different jurisdictions, representation of the different jurisdictions and sub-jurisdictions thereof that an organization operates in and representation of regulatory or governing bodies within the different jurisdictions, and an explicit naming/referencing scheme in which nodes are specified by a hierarchical path of said hierarchical model, wherein each node is named or referenced as a unique node by specifying a complete hierarchical path that starts with a country, or a geographical region or jurisdiction equivalent to a union of multiple countries; a legal references library (LRL) module that contains applicable legal references; a legal references policy mapping (LRPM) module that maps legal references to policies; and a requirements cross-checking (RCC) module that cross-checks information in the legal references policy mapping module.