“As the incidence rate rises in the early autumn of 2021, further border measures cannot be ruled out. Luxembourg will insist on respecting the framework established by the above-mentioned regulation to facilitate free movement, and on the principle of proportionality for any new measure,” Lenert and foreign affairs minister Jean Asselborn (LSAP) said.

EU rules from June 2021 put in place the digital certificate for travel of vaccinated, tested or recovered individuals but allowed member countries to implement additional restrictions.

In Croatia, for example, the vaccination certificate is valid only 270 days until after completing the vaccination schedule. In Austria, it’s 360 days. 

In Luxembourg, the vaccination certificate is valid for one year, meaning the first documents will expire in the coming months. The grand duchy kicked off its vaccination campaign in December 2020 with healthcare staff and care home residents. 

Booster shots are currently being rolled out to the elderly and those suffering from immune deficiency and the ministries said the validity of the certificates could be extended pending the latest developments.