Abstract
This article summaries the issues in intertemporal law surrounding the amendment of the Provider Liability Limitation Act and its related ministerial ordinances. The intertemporal law is said to be the law that determines which of two legislations governs a legal fact when they stand in a temporal antecedent relationship. The revised ministerial ordinance of 2020 allowed requests for disclosure of telephone numbers, and the revised Act of 2021 made it possible to request disclosure of log-in information, but the question is whether these new rules apply to infringing information posted before these rules came into force (I). This article classifies cases from the perspective of when the new rules come into force when the infringing information is posted, and when it is deleted (II) and examines whether the new rules can be applied to posts deleted before the new rules come into force, focusing on the infringement status (III), or whether retrospective application is permitted in exceptional cases (IV).
https://ror.org/057zh3y96 
