Actually found a pretty good source on what the Korean rules are (hint - it is about paid peering).

This is somewhat biased (it's from a Spanish telecom - actually editing this again, the style choice + date formatting makes me think it is from a Korean trade group/telecom but the only source I can find for this is Telefonica. Likely from the Korean telecom industry itself...).

Just haven't really seen a comment linking to anything substantial about the actual plans/rules/etc in Korea.

https://www.telefonica.com/en/wp-content/uploads/sites/5/202...