On 10 March 2022, the Korean Communications Commission (KCC) released and enacted its guidelines on "Criteria for judging the illegality of prohibited acts by app market operators (notice)". These guidelines outline how the KCC will evaluate whether store operators are harming market innovation and whether they are impeding customer rights, by assessing whether they offer alternatives to in-app payment systems. The ban on app store providers requiring developers to use their own in-app payment systems was implemented by an amendment to the Telecommunications Business Act.
Original source