Any contract which is against the provisions of Articles 280 through 287 and is disadvantageous to the superficiary has no effect.
Civil Act — Article 289 (Mandatory provisions)
민법 제289조
For AI agents and developers — get this article as JSON, with the English and current Korean effective dates and an outdated-translation flag, from the korea-law API or as an MCP tool:
https://mcp.apify.com?tools=kr-data/korea-law