The internet is not a lawless space. All laws of the "real" life also apply to the virtual area. Thus, every domain holder is liable for the name and content of his domain.
If a new domain is registered, nic.at does not check whether rights have been violated. Otherwise the delegation would take weeks or even months. As a consequence, the verification whether rights are violated is the duty of the domain holder. If a domain name violates your rights to a name or trademark right, please contact the nic.at legal department.
In case of a legal dispute regarding a domain, the Wait status should be requested for the relevant domain. The domain remains fully operational. While it can be cancelled by the domain holder, a transfer to a third party is not possible. The Wait status can be requested by anyone. However, the legal fundamentals must be evident.