University regulations with regards to travel abroad
Always check the latest guidelines on: https://www.staff.universiteitleiden.nl/human-resources/conditions-of-employment-salary-and-allowance/business-travel?cf=science&cd=leiden-observatory

It is not necessary to get approval for a green/yellow zone country business trip anymore. Only for orange/red zone countries the scientific director of the institute and the Faculty Board must give approval. Please note that in this case you should do a safety training before you go. This can take some time and you should contact the Director of Operations about the costs. Please check https://www.staff.universiteitleiden.nl/human-resources/conditions-of-employment-salary-and-allowance/business-travel/travel-to-high-risk-areas/science/leiden-observatory?cf=science&cd=leiden-observatory#you-wish-to-travel-to-a-red-zone

Travel insurance
Employees going on business trips can make use of the University’s collective travel insurance scheme. This means that you do not have to take out your own business travel insurance when travelling abroad for your work. The University has taken out collective travel insurance via ACE.

Employees going on business trips must install the Chubb Travel App during a business trip. This is important because of the University’s collective travel insurance scheme. Please check the university website for more information: https://www.staff.universiteitleiden.nl/human-resources/conditions-of-employment-salary-and-allowance/business-travel/work-related-travel-insurance/science/leiden-observatory?cf=science&cd=leiden-observatory