Thanks for the reply!
Yes, I'm aware of that, but I'm not completely sure how the nameserver part is done in practice. They use the term "configured" which implies that something has to be done beforehand. Here's the full excerpt from the Finnish Communications Regulatory Authority's website:
"You cannot reserve the domain name in advance and you will be asked to give name server information in the application form. Contact the Internet service provider you have chosen unless no name servers have been configured to serve your new domain name. The service provider can also forward the application for a domain name on your behalf. You will not be able to find the domain name on the Internet or receive e-mail unless no name servers have been configured to serve the domain name.
The domain name service will automatically check that the name servers specified in the domain name application function properly. All the name servers that have been configured to serve the domain name must be indicated in the application. Each name server must function. If one or several name servers do not pass the name server test and are not repaired within the deadline (1 month), the application for a domain name will expire and the applicant will lose the domain name. The fee will not be returned."