Reading through the is domain rules [0] (which are in addition to the ToS), it does seem like the only requirement most people will have to watch out for is tha

Reading through the is domain rules [0] (which are in addition to the ToS), it does seem like the only requirement most people will have to watch out for is that there website must comply with Icelandic law, which, considering their more complicated understanding and implementation of GDPR (some parts have been rejected), may be quite a task. [0] https://www.isnic.is/en/domain/rules https://www.isnic.is/en/domain/rules