This kind of question that involves complex company-specific licensing issues is best handled by Customer Support. Please submit a new Service Request with your questions and we will be happy to help you.
a company has a server in europe and deveolpment sites in
europe, US an japan.
So you can use one license for three sites in one day.
Thats the reason for having world wide licenses
Cloud is a different scenario.
EDA in the cloud would mean, you buy a sevice on demand, not a license.