Country and City Reports:
Analysts update Country and City Reports based on major developments. This means that things like national elections or major terrorist attacks will be captured in the reports - and the overall risk re-assessed - shortly after the fact. Because these reports are assessments of long-term hazards and threats, not every incident will necessitate an update.
When there have been no recent developments, Country and City Reports are reviewed and reissued annually.
Advisories are updated frequently - sometimes several times each day - in the immediate aftermath of major events like a hurricane or terrorist attack. All advisories are updated as the situation they describe changes.
For situations that remain relatively static, Advisories are reviewed and reissued annually.