Final answer:
A strategic requirement for a global information system (GIS) includes communication between headquarters and subsidiaries, global data access, and consolidated global reporting.
Step-by-step explanation:
One of the strategic requirements for a global information system (GIS) is communication between headquarters and subsidiaries. This is important because it allows for efficient coordination and exchange of information between different branches of an organization. Another strategic requirement is global data access, which ensures that relevant data and information can be accessed from anywhere around the world. Additionally, consolidated global reporting is necessary to provide a comprehensive view of the organization's performance across different regions.